I've had my Tacktick Micro for 6 years with no issues. Given, I don't use it a lot of the time.
I don't think the units with GPS being disabled are considered legal since they have the software to be able to do GPS. Therefore the Micro really is the only way to go.
I remember when the micro was only $250 about 8 years ago, unfortunately I put that one on the roof of my car and drove away, Do'h!