I've used SheetWhiz for about 7-8 months now and it's worked amazingly. Given I've had to transition from Windows to Mac (and Excel to GSheets) - and I'm a previous Excel power user, I've found that it gets you to 80-90% of the functionality that you would have on Windows Excel with very little ramp time to use. I pretty much started figuring out how to use the shortcuts within 15-30 mins. So pretty neat. David and team are super responsive to requests, feedback etc as well - you can literally just add them on LinkedIn or email them or do whatever you need to do to contact them and they're incredibly approachable. Highly recommend!