I use it mainly for costing items. In particular, I like the way it handles scrolls and weapons/bonus items. The way it removed the dichotomy between bonus and "fixed cost" items sits well with me, and also made an effective way to continue using 3.0 weapon/armor enhancements without much of a translation issue.
I tried pricing staves with it, but I think that it makes them too expensive. I was considering a house rule adaptation for it, but never found anything I liked. For now, I have reverted to core pricing.
I don't use the feats; I consider the flavor aspect of some specific item creation feats and class abilities and important aspect of those options and don't like opening up all items to a narrow range of feats. I'm all about the flava.
I also, as I've said before, have no issue with XP costs for items, though I do allow players to defray XP costs with exotic components (using the levin rules in Green Ronin's Advanced GMs Guide).