I had to replace my UR22 because I needed more than two ports, and this was in stock at the time- but I’m very glad now that I bought this. Space is at a premium (even more so now that I have to work from home on the same desk!), and it is super-useful to be able to plug the two synths that are always needed into the rear two ports and simply forget about them, leaving the front two ports for guitar, mic, third/ fourth synth as needed. Solid, reliable, whisper-quiet, yet built like a tank- perhaps the only problem I may have with it is that I will soon be running out of ports again...