I've had 3 Mitras units for 4 years now - 2-6200's and 1-6100.
I haven't had a single hardware issue with them, the software was a challenge at first but GHL is improving how user friendly the software is.
Mike Paletta seems to like the Radions:
https://www.youtube.com/watch?v=S5HJVxfWQ2c
.