Bought this second hand and felt compelled to find this on Amazon and sing its praises!
I did a lot of research before deciding to go with this unit, and read review after review after review trying to decide which interface to go with. I settled on this and after owning for a couple of weeks and installing it on 2 computers (1 old mac - OS 10.4, and 1 new mac) I haven't had a single problem with the unit.
The routing options are a doddle to work out, the installation took seconds, the quality of the thing just 'feels' right. First impressions are that it sounds great. And this will give our small band loads of options when recording new material, and recording gigs.
Other options I considered were the Presonus Firestudio & Mackie Onyx Blackbird. And a host of other 8 in 8 out boxes.
Really glad I went with this one.
Hopefully i've made your decision a little easier, as I know what a nightmare it can be choosing between all the interfaces available.