"looks around the room shamefully"

I use an old Digidesign Mbox2, bought off eBay for pennies. It does everything I want it to do and I'm now wondering what the differences are from the newer generation of interfaces? It came with no software, but I downloaded the drivers and it hooks into Garageband seamlessly and performs its' tasks very well.... as far as I know!

I do very basic recording - just layer the tracks in, alter levels and position in the stereo spectrum etc. - and wish to take up Sonics' offer of assistance with Garageband as I'm very much the fumbler at this.... :-)