I feel like it's comparable to an LPDA (which I tend to prefer for most backroom functions). I think what sets the myDevice apart is how fast it is at SUBT9999 things. There's no toggling and it only takes 3 scans.
It's a shame though, they will never be used fully until devices start to be phased out at my store.
They have gotten a crap rep by being unstable crap. And they should have stayed in beta testing until they made the basic function rock solid. But no. They sent them out to stores and now users like me have no time to deal with their crap. Cause they failed one to many times.