I shouldn't need to really explain how good this unit is, if you are here then you know what you are looking at and are clearly serious about your audio and music.I bought the quad version instead of the twin for a project studio and as much as I hate to admit it it is way to advanced for my needs as a bedroom producer an could do with getting some new software...This is practically brand new as I say it's 3 weeks old and they retail at £1199..I will sell for £1000 and throw in an official apple thunderbolt cable £40rrp bought at the same time.So to recap this is the Quad-core version, that's twice the processing power of the duo for a third of the price extra!!! Absolute bargain!Please someone take it and use it to its full potential, the new unison technology is amazing and you can hear the converters switch impedance when you activate the pre amp emulations. It's pretty amazing, but you knew that already...Included is the analogue classics bundle, you will need an active UAD account and email so I can contact them to transfer the plug-licences...That's it really, any questions just ask. The item will be well packaged and sent recorded deliver with parcel force 48 so can be tracked throughout transit.Cheers...