uncle_rico
You'll have to decide that for yourself. When I view them on my desktop computer running two 24" screens in portrait mode, the player doesn't run full screen, but it's pretty good size on one of the screens and I think the videos look good.
I view them on three iPads, including an iPad Pro 9.7 and an iPad Pro 10.5 and they look fine (to me) full screen.
If you're wanting to view them on your ginormous flat screen TV, you probably won't be happy with them.