I haven't actually played GregTech since early 1.5.2. Since then, it has gone even further away from being an IC2 addon and towards being a standalone total conversion mod. You probably still need IC2 for now, but it won't stay that way forever.
As I don't know the current state of things, i can't comment whether I like it or not. I liked past iterations, though.
I think most people who dislike GregTech are either huffy because Greg blew them off with a rude comment once, or because they expect GregTech to be just another content mod they can throw into a large pack for some extra features, only to find out that nope, it doesn't work that way. Treat GregTech like you treat TerrafirmaCraft. It's not an addon to a mod. It's a total conversion of Minecraft itself, with all the bells and whistles, and it's only going to do more of it in the future.
As I don't know the current state of things, i can't comment whether I like it or not. I liked past iterations, though.
I think most people who dislike GregTech are either huffy because Greg blew them off with a rude comment once, or because they expect GregTech to be just another content mod they can throw into a large pack for some extra features, only to find out that nope, it doesn't work that way. Treat GregTech like you treat TerrafirmaCraft. It's not an addon to a mod. It's a total conversion of Minecraft itself, with all the bells and whistles, and it's only going to do more of it in the future.