petitmal: Indeed, hardly any store does everything perfect. Nor do they have to. As long as they at least do what they promise.
So: no. I do not like GOG. Yes, their support people are a friendly bunch, but so are the support people at other stores.
It's GOG and its policies, which are pretentious and sometimes downright dishonest. I can go into detail but that doesn't seem to be the purpose of this question. (Are you familiar with the (Dutch?) proverb: "Trust arrives walking and departs riding"?) Lets just say GOG is very good at make believe; windowdressing. Just read the bulk of the comments to this post.
It is the main reason GOG stopped to be my preferred place to buy games though at first and helped to decide to no longer buy games from a little over a year ago.
This raises the question why you are here if you don't like it.
If I don't like something, I don't waste my time being angry about it and do something else instead. But that's just me.