I don't have a "complete lift kit" yet, but am more or less flying by wire, adding a piece here and there... That having been said...

I have two SLR products, and the customer service and quality of the parts speak for themselves. Ian of XOC fame (hehe) has their Stage-something kit, and is under "Reviews" here on XOC. He is also impressed. I don't think you could go wrong with SLR.

Calmini, overall, doesn't really impress me. Their parts strike me as cheap and sort of boxy. I could be wrong though, I'm just going by what I've seen on their site.