We have a hd several goes at this type of box. This is the first one we have not had to refer to the manual. We have acheived our sounds in quite a short period, and found the interface intuitive and easy to use. The sounds are quite clear and easy to customize. Me and the wife both have one and use them differently but have no issues. SO Guitar sounds are great, what about the vocal input? Fine also. In fact we took everything except harmonizing away from our other equipment and just run the output into the desk with no further processing. Easy to use with a sophisticated sound engine which has lots of headroom. We haven't managed to upset it or overdrive them yet. Cons? Not really. Wish list? 1 Autowah 2/ Voval harmonizer. Thanks Fender.