The launcher is annoying, but not enough for me to really care.
It's basically a different icon and you can install games in such a way that they just click on the icon on the desktop and you don't need to worry about the launcher at all.
But as far as their products go they're fine, they offer good quality products for reasonable prices, they don't seem to take an unrealistic cut of proceeds for games on the platform. They certainly have never attempted to pull anything like Unity has done.