Have you ever gone to a guild show and there hanging all in a row are 5,10, 15 quilts ALL EXACTLY ALIKE? All the same size, all the same colors, all the same design, ....
That's what you get with a BOM kit quilt....
I actually bought a BOM at Joanns - it was on the markdown and each 'block' was $3.97 and the finishing kit was $20... it was 'ok' but not something I'll do again..