Sheets is definitely usable but it's a bit light on functionality. I'm using the new Excel for Mac right now and it's just very slow and buggy. Also, the aforementioned alt-key shortcut is absent in the Mac version. Not having these shortcuts literally adds hours to my workday.
I'd probably pay 300-400 dollars for an Excel alternative with full keyboard shortcuts.
I tried it many years ago and it was lacking features like pivot tables and scripting. Overall, I got the impression that numbers was more consumer than professional oriented. Haven't used it recently though.
I'd probably pay 300-400 dollars for an Excel alternative with full keyboard shortcuts.