I haven't entered quilts. Other items. I won with a hat.
I found it easy. I didn't have any judges comments that were out of nowhere or bizarre. I have seen some that I wouldn't want to receive.
It really depends on how well you take criticism. If it will wound you forever or make it difficult to continue making quilts, then I wouldn't do it. If you think you might learn something from a valid criticism, then go for it.
I think all of my comments started out with compliments and listed areas where improvements were needed. I agreed with everything except for one comment related to how a fair worker had broken my item. Apparently, the judge thought that was a poorly chosen design element. Ha.