Used them until they banned my address for abusing their first time customer coupon.
Huh, so that's what I can look forward to.
I'm on order #4 with them. All been stuff I was being picky on price and not timeline. Got 4 new wheels for my truck (15% + the volume discount for buying 4 was killer), a mattress pad, a bunch of shotgun toys, and the latest is a pair of OE replacement fog lights for my car.
My observation is that their prices vary wildly from a pretty good deal before any discounts, to piss poor even with all the discounts. If you want to buy something, and still have headroom before the 15% maxes out, you can go "grocery shopping" for random stuff that's a decent deal, and gets you more volume discount... like, literally, adding grocery stuff to your order. If you've got some higher-dollar items in your cart, little stuff that drops prices can save you a good bit.
I don't think they'll be around too long... but I'll happily take advantage of the deals while they are.