I grew the KS for my second mushroom grow the first grow I used homestead book company kit. I highly reccommend that kit to first timers that don't want to jump in with both feet and do it all yourself. Anyway, to some extent a cube is a cube, but there are differences, and the different strains will perform differently. Example, one of the strains I grew were burmas, and I had tons of problems with it, and after a couple months finally got one flush off it. I tried again, same results. Which was wierd considering my other strains were flushing like crazy on the other side of my fruiting chamber. The KS performed awesome, the first flush started with TONS of smaller mushrooms which were great, and each flush after grew less fruits, but they got larger each time. That tray flushed 4 times nicely and the last flush had alot less mushrooms but they were about 8-10x the size of the first flush.
The KS are absolutely one of my favorites, the blue meanies were great, the south americans I grew didn't yield as well, but had AWESOME visuals( my floor looked like paisley that night). Another strain I grew that I got the spores from friend was supposed to be call Ereal and be from russia. I've never found any info on these "ereal" mushrooms elsewhere so I don't know what they really were but they grew real well, and were great quality.