The mod itself is heavy, and that's a plus for me. Turning off the mod could be more easy I think, it takes 8 clicks trough the menu to shut it down. If you have access to continuous charging then you can just lock it and leave it on.
On the sides there is a gap where you can actually see the batteries, so maybe don't use it in pouring rain.
One of the magnets holding the backplate came out from its socket after I dropped it, but you can easily glue it back. If that happens just make sure you put it back the right way.
In overall I'm happy with it, screen is slightly hard to read on a sunny day.