Everything from the mic pres, to the AD/DA, to the guitar ins, to the headphone amp is great. I have yet to try the Reamping outs. I assume that it is as good as everything else in this unit. Also there is the possibility to add 16 additional I/O with ADAT expansion. Please notice that this is not SPDIF Toslink, just works with ADAT connections. A small disappointment since I have some external DACs that I would have liked to have the option to connect. Still I can connect them with the Spdif included in the interface as well. The only thing that was a little disappointing was the drivers. I'm opening projects I was able to open with my previous RME digiface (using Ferrofish converters A16 MK ii) and I get stuttering. Even putting the buffer to the maximum doesn't help that much. In the worst case scenario I can still connect it via ADAT to my Digiface and use the amazing RME drivers with this Presonus. I find that I use plugins less with this unit since the D/A is of very high quality (maybe I was overusing a little too much vst's in my projects anyways). Also nice that the unit looks and feels great. The biggest surprises were the instrument in and the mic pres. Both sound amazing with anything I tested them with. Have some patience with the universal control software, just as with Totalmix it takes some time to learn. Highly recommended even compared to units that cost 2 or 3 times its price.