The one thing that I might look for would be bearding on the back. Bearding is when a small part of the batting gets pulled out when the thread exits the fabric. Other than that there shouldn't be any major problems.
Most batting manufacturers list the information about shrinkage of their batting when washed. I use Hobbs Heirloom Wool most of the time and according to Hobbs it shrinks 3% to 5% with the first washing. I don't wash my fabric so my batting and top and bottom shrink about the same percentage and it works for me.