Well, but I'm used to WinRAR and never had any issues. Only need it once every few months. And it's pretty fun when the software tries to tell me that it isn't a free software. What a silly thing to say!

Didn't Microsoft get in trouble for trying to steal 7zip code without credit or something?

it's the most convenient, but i still use my winrar for some things, mainly some of the self-extractors i build and when i want recovery bits.