I've bought strips, charms, and 10" squares from CT and out of all of those only ONE single charm square was mis-cut; the corner got folded over somehow before cutting so I had to trim off some excess fabric. I haven't bought a TON of each, but I've been very happy with everything I've gotten so far.
Interesting that sometimes they pink their pre-cuts; all of mine have been straight cut which is what I prefer.