[Righty27]

I only tested for a short period and it performed fine at the highest settings i.e. 60fps and using my iPad Air's full Retina resolution.

These are probably too high for this application and might be less of a draw on my Late-2009 iMac if I was to reduce these ... so I can't speak for reliability yet but it does appear to have better reviews than Air Display so may be worth trying out at the 50%-off price of $9.99 (just checked and it's still discounted) ... and a pretty cheap way to try out Touch Bar if you're on Sierra.