Now this is an old (as in outdated) piece of equipment and I don't know why anyone would be in the market for one, but it has mostly worked fine for my small home setup for the past 9 years or so. It was great value for the price and the preamps are as good, clean and transparent as the day I bought it. Today there would be no sense in getting a FireWire interface, but back in ~2010 it was the bee's knees compared to USB.
I'm a Windows user and M-Audio hasn't updated their drivers since 2013. This is somewhat annoying as there is a nasty, although rare, bluescreen bug (IRQ level violation in ring0) that sometimes rears its head when changing the ASIO sample rate. Thankfully it used to happen much more often with Windows 7, but rarely if ever occurs with the current Windows 10. To reiterate, it is still a bug in M-Audio's code, not Microsoft's.
Great build quality. When looking at new interfaces I'm often put off by the visibly shoddy plastic construction and shitty knobs. This thing is made of metal throughout and the knobs and buttons might just survive a missile strike. M-Audio doesn't give a shit about supporting their legacy products though, and FireWire is all but dead, so meh.