Very true, the elastic on the leg seams is lower quality. The leos we got do have elastic, it's just not as tight as in the brand name leos. If you wear shorts for workout, I imagine it's fine.Dancewear solutions does have good prices and fast shipping, but I've found that there isn't much elastic at the bottom... it can be a bit saggy or it will move around a lot as there is no elastic to hold it in place. Not a problem if you are allowed shorts for training.
Melody leotards is another favourite of mine as you can choose your own colours. This allows you to stay away from bright neons or patterns.