Thanks from me, too! Works perfectly and after a big dissapointment realizing that my RPi 3+ will not work with Ubuntu Mate, you made my day. Maybe this is obvious to those mastering Linux, but to save others' time and nerves: it is worth noting that any subsequent software update should be done with caution. Firstly , boot partition is too small for upgrades and needs to be resized. And, firefox, for instance, did not work after upgrading. I didn't bother downgrading it, but rather reinstalled the whole OS anew.
All in all, it serves it purposes as it is.