30MP Hitori Gotoh

30 Minutes Preference are 'premium' sister kits that are a little more detailed than their counterparts.
Note that 30MP is not the same as 30MS, these are less generalized kits, so they are not fully compatible. In this example, the waists and legs are thinner, with a different torso structure, however you should be able to swap hair, face plates, arms and so on, for the most part, just don't be surprised if something doesn't fit perfectly.

This is Gotoh Hitori, aka "Bocchi" from the show "Bocchi the Rock".

Aesthetics:
The kit represents Bocchi in her live-outfits with three lower body options, either pink leggings with sneakers, bare legs under a skirt with loafers and a molded skirt option for sitting (again with sneakers, meant to be used with lower legs). The logo is molded-in detail.

The Guitar in the pictures, is painted, but the real thing does have some decent color separation. The straps are textured on the outside, so they don't look like cheap plastic.

Bocchi's hair (with her signature elastic with cubes) comes in two modes, relaxed and 'head down' where the bangs protrude more, like she's rocking out or hanging her head in full blown anxiety. Similarly there are three rubber skirts, one for sitting, one relaxed/standing and one dynamic/standing.

Compatibility:
As far as I can tell she (and the others) uses Color B skin parts.
As noted the waist and legs are slimmer, so there are going to be some compatibility issues with 30MS, so even though you get an extra pair of legs, the use case is going to be limited, mostly to the other band girls.

The hair, face plates, arms+hands and shoes should all be entirely fine for use with other kits, just note that she doesn't have that little hair tab, so you can't put cat ears on her. A crime, I know.

You can put the guitar on pretty much anything as it is.

Equipment:
2 Face Plates - Neutral/spaced out and serious/focused
2 blank Face Plates
1 sheet of waterslide decal expressions
1 Guitar with two straps
1 Pedal Setup for the guitar and a wire
12 various Hands (for guitar use) - The pegs are fixed to the arms
3 pairs of Sneakers, bent-toes Sneakers and Loafers
2 pairs of Legs + sat down lower body
3 Skirts
1 set of Alternate Hair Bangs
1 transparent Beverage Can (apply waterslide decal)

Conclusion:
Personally I think it's a little overpriced and not quite as nice as the 30MS FGO Altria Caster kit, which has nicer details and more interesting parts.

However, the extra expressions are a god-send if you have a ton of empty face plates and never got the first 30MS decal sheet. A lot of Bocchi's freak-out expressions are on it (17 expressions in total) and many of them are universal, such as a smug face, a ">_<" face, a puke face and many more, that you can easily use with other kits, even if they do have pink eyebrows (which bangs will often just hide anyway).

For the guitar, I recommend using a regular/fine tip silver marker to highlight the strings easily. I'd avoid using the gunpla markers, as they leave large amounts of paint that'll just flood in between the strings.
I tried dry-brushing silver paint on, but it mostly just made a mess that I had to clean up. Lesson learned.
Gold or copper also works fine, if you don't want a steel guitar look.

30 Minutes Preference are 'premium' sister kits that are a little more detailed than their counterparts.
Note that 30MP is not the same as 30MS, these are less generalized kits, so they are not fully compatible. In this example, the waists and legs are thinner, with a different torso structure, however you should be able to swap hair, face plates, arms and so on, for the most part, just don't be surprised if something doesn't fit perfectly.

This is Gotoh Hitori, aka "Bocchi" from the show "Bocchi the Rock".

Aesthetics:
The kit represents Bocchi in her live-outfits with three lower body options, either pink leggings with sneakers, bare legs under a skirt with loafers and a molded skirt option for sitting (again with sneakers, meant to be used with lower legs). The logo is molded-in detail.

The Guitar in the pictures, is painted, but the real thing does have some decent color separation. The straps are textured on the outside, so they don't look like cheap plastic.

Bocchi's hair (with her signature elastic with cubes) comes in two modes, relaxed and 'head down' where the bangs protrude more, like she's rocking out or hanging her head in full blown anxiety. Similarly there are three rubber skirts, one for sitting, one relaxed/standing and one dynamic/standing.

Compatibility:
As far as I can tell she (and the others) uses Color B skin parts.
As noted the waist and legs are slimmer, so there are going to be some compatibility issues with 30MS, so even though you get an extra pair of legs, the use case is going to be limited, mostly to the other band girls.

The hair, face plates, arms+hands and shoes should all be entirely fine for use with other kits, just note that she doesn't have that little hair tab, so you can't put cat ears on her. A crime, I know.

You can put the guitar on pretty much anything as it is.

Equipment:
2 Face Plates - Neutral/spaced out and serious/focused
2 blank Face Plates
1 sheet of waterslide decal expressions
1 Guitar with two straps
1 Pedal Setup for the guitar and a wire
12 various Hands (for guitar use) - The pegs are fixed to the arms
3 pairs of Sneakers, bent-toes Sneakers and Loafers
2 pairs of Legs + sat down lower body
3 Skirts
1 set of Alternate Hair Bangs
1 transparent Beverage Can (apply waterslide decal)

Conclusion:
Personally I think it's a little overpriced and not quite as nice as the 30MS FGO Altria Caster kit, which has nicer details and more interesting parts.

However, the extra expressions are a god-send if you have a ton of empty face plates and never got the first 30MS decal sheet. A lot of Bocchi's freak-out expressions are on it (17 expressions in total) and many of them are universal, such as a smug face, a ">_<" face, a puke face and many more, that you can easily use with other kits, even if they do have pink eyebrows (which bangs will often just hide anyway).

For the guitar, I recommend using a regular/fine tip silver marker to highlight the strings easily. I'd avoid using the gunpla markers, as they leave large amounts of paint that'll just flood in between the strings.
I tried dry-brushing silver paint on, but it mostly just made a mess that I had to clean up. Lesson learned.
Gold or copper also works fine, if you don't want a steel guitar look.