The ones I got seem pretty smooth in that regard, no pieces coming off after 3 coats, but I do find they tend to lay the paint down a little heavier, requiring a little extra rolling out. On the plus side of that, I start at one end of the panel, and sweep along it slowly about 1 - 2 inches at a time and I have virtually no roller lines.
Don't know if this helps anyone else out, just passing along my opinion. Not right or wrong, just the only thing I have that's really mine
Everyone seems to be adding some really good points and tips as this thread (thread? more like a rope by now) goes along. Makes for very interesting reading and viewing of the results.

I want to die like my Grampa, peacefully, in his sleep. Not screaming in terror like his passengers.