I am one of those people that likes the precuts because of the fabric selection. I don't have alot of confidence in my ability to chose complimentary fabrics, and honestly, this isn't really a part of the process I enjoy, so I love the precuts, as they have a cohesive look.
Its the best of both worlds, because you get a great look with lots of beautiful prints, and I only have to choose my favorite for a border/backing, etc.