Many other -even pricey- media players lack of Stop button. I didn't find it too much discomfortable, I'm also -relatively- fine with pressing the Back button to quit playback. Stop button would come in to use when one's would want to strat a video from it's beginning numerous times repeatedly, which isn't my case, but I agree that it would be handy in several occasions and overlall.
I would be -almost- satisfied with its build quality and comfort as far as casual video playback controlling goes, but for other apps, YT and browsing a good keyboraded air mouse is a must have replacement for this device (IMO). (Most of the advised Air-Mouses also lacks the dedicated Stop button, BTW...)
The only really annoying thing I had to discover after couple of mounts - and non intensive- of use, is that the OK button started to intermit, and sometimes needs much more press effort to get it right. It testifies somewhat about the remotes overall build quality and durability in longer term...