I use this exchange.

The good things: US regulated (all of their licenses are posted on their site), has up to 5% cashback earning card, already has partnership to launch cards in EU, seems to always have chat support (seems to be US and India based), is adding bunch of coins this month, is launching Earn this month, Earn benefit sweets by up to 20% for card holders, fees used to be as low as 0.1%, the owner seems to a fairly well established guy, etc.

The bad thing is (a) app is kinda broken (b) card has 30 cent fee per swipe which makes it only ideal for large purchases and (c) their card was promoted by some MLM scheme which really hurt them.