I got the Baby Trend Nursery Centery Playard and have generally been pretty happy with it. We never used the changing table or the diaper stacker, but the little music center thing was genius - it had a vibrating function that DS liked, and the nature music was soothing for him. The light on it was also helpful.
It was a baby shower present, however, and if I hadn't gotten it then I probably would have regretted purchasing it because we all slept better once we started putting DS in his crib at a few weeks old. It's only been in the last month that we've been putting him in it again for naps so that he'll sleep better in the Pack 'n' Play at my in-laws' house.