I have a Galaxy GeForce GTX 680 that hasn't failed me once. I'm greatly appreciative of its performance with all games I've played. I recommend Galaxy as a high quality company for Nvidia products without a doubt.
Frankly, I don't own one yet, but I would say it would be the design work along with the quality they provide. The designs look fantastic, and I've almost never heard of anything negative about their video cards. Overall, I'd give them a 5 out of 5 rating just on that alone.
Galaxy has great customer support that I have seen here on the [H]. It seems to be the best since BFG went out of the business. I want to support that level of customer support!
I've been folding on a Galaxy gtx 480 for a long time now and it's been rock solid even after 2 of the fans wore out. I replaced them and it's still running solid. I'd love to add another to my folding rig.
Trying to reach their customer service is a pain in the... Oops, I mean Galaxy is a great card. I have the GTX680 4gb and haven't giving me any trouble yet. Again, great card!