Do a search.
You'll find plenty of problems. The latest batch of drivers seem to work pretty good. The Aardvark guys are decent, but they're bad at delivering on their promises.
I don't use the most-most recent drivers, as they fucked up my computer, but the ones before that worked good (for me).
Good thing I kept the older ones, cuz at least at the time they don't have different driver versions on their sight.
Now my card works great. I can get about 10 milliseconds latency with a ton of tracks and plugins, and still play a softsynth. If I hadn't had my backlogue of personal experiences with them, I would heartily recommend the card.
It's kind of like Motu, very hit and miss. Except for the most part the Aardvark guys seem very decent. (Though they were surly when I asked for a legacy driver). I've heard poisonous stories about motu support
You probably will have no trouble. But if you do have trouble I haven't found Aardvark particularily able and in some cases willing to come through.
-Jett