I needed an interface to generate 24bit/96kHz materials in MSP and for mixing, not enough for RME, I decided to buy the firebox and to help me finish my project.
I work on a MacPro, 2 * bi2.66 with 5GB of RAM.

UTILIZATION

No problem (except maybe sometimes she "rode" no, I had to de-reconnect for it to be recognized).
Incompatibility: it is not recognized by Kontakt, you must create an Aggregate Device in the editor "Config. Audio-MIDI" ... and this device "virtual" to be recognized.
In general, normal operation.

GETTING STARTED

No driver required, the widget is "class compliant".

I use it with Digital Performer, WaveEditor, Kontakt and MaxMSP (mainly)

So since I am asked to answer questions and registration latency: let's get to the point!

I use this card for a short time, as I said earlier, it was to help me out and complete a project (primarily for mixing and editing). The 'monitoring', say it's fair, it does the job ...

For cons, I had the bad idea to try to catch sounds: This is a DISASTER! A kind of 'hiss' or clock noise as soon as you push the preamp (which sound miserably to use music).

OVERALL OPINION

So it's a quick purchase, on a recommendation from a friend (?) That I would do absolutely not. As a professional musician, I can not work with this type of material, and have, as was the case, having to redo much of my sounds, even after trying to "denoiser" everything.

For someone who wants to podcast, or recording as a hobby, still going ... but ... let us remember the adage:

"You get more for your money"