I don't have that collection yet (it looks great) but I have 2 of their shadows and I really like them. They have great staying power and they are pretty pigmented. maybe not like mac but I don't always like them that bright or dark. I would definetly buy that set if that makes you feel better.
I was just at Sephora today so I visited the Lorac eyeshadows...they are very nicely pigmented, not as much as MAC but that's probably for the best. The colors seem to have a lot of staying power and I would totally consider buying that set.