If you look at reviews of Z-Wave dimmers and switches, as I did recently, GE seems to be not very well regarded, and on the expensive side. Some of the newer brands like Zooz and Inovelli have a lot more features and are cheaper too. I narrowed it down to those two and then recently replaced a bunch of switches with Zooz products. Happy so far. (Can't speak for zigbee.)
The GE switches are made by Jasco. I have a few different brands of zwave switches and the GE/jesco ones are my favorite. The newest version is much more compact and they auto sense line and load so they are much easier to fit in the existing boxes.
