I use it don't like the app it needs a lot of work to ever be on par with steam.
Saying that it's been alright, free games is never a bad thing really, but when they have the £10 coupon with every game in a sale, it makes for some real bargains i got disco elysium for £10 at christmas time due to that so i'm not going to complain too much.
But it will never be a replacement for steam for me, just another app like Origin and Uplay ect, even GOG Galaxy is a far better application, so while I don't hate it given the choice i would prefer not to use it as much as it may seem that tim wants me too.