Unregistered WinRAR for life
7-zip is okay on the format side since they added some of the newer high-efficiency compression algos, but the UI still sucks compared to WinRAR.
I take it you're doing more than is offered in the right-click menu?
I like to use a good UI for that stuff when I'm on a graphical system like Windows anyway, and WinRAR is consistently better at that than 7-Zip.
I even seriously miss WinRAR when working on MacOS. Does anybody have any good suggestions for archive managers (may also be expensive ones, I don't care much if they are really good) with similar UI and functionality as WinRAR on MacOS?