I bought one as a backup, and really like it. If you like MBritt profiles then you should definitely get the MBritt pack for HX Stomp. His presets are very similar in tone to his Kemper profiles.
In particular, I like being able to use two amps at once, in parallel or switch between amps in the same preset.
I could do a gig with just the Stomp no problem. But, I am going to add a small midi switcher (Midi Baby 3) and a pair of expression pedals.