I really like mine. It's nice being able to run 4 mics, or mics + sbd and having the option to use one or the other source, or a mix of both. The unit has four preamps on it, unlike the SD 744t which only has two preamps, but two additonal line inputs. There are a few things that I would like to have on the R4's, like the option to run digital and analog inputs at once, better meters, a usb output, etc. But overall, I would definitely recommend it to anyone!