I purchased the 350gph model last month, and had it running on my stingray tank since it arrived. It was easy to set up, inluded eheim media (or at least a reasonable knockoff), very easy to prime, and didn't lose prime when I unplugged it. It made my water very clear (even with 3 stingrays) within 24 hours of adding it to the tank.
Its very quiet (quietest filter in the house), is large, moves quite a bit of water, and filters well.
I like it, and for $90, you can't beat it. I can't say anything as to how long it will last, since I've only had mine a month, but so far its been a solid filter. And its only $90...