I am a "Point of Success" Fanboi. Learned about it at PMQ, tried standard, loved it, beta tested latest premium edition, love it even more
The reports available are great, and get to see realtime labor cost on the fly. I just save reports in PDF format and email them to the accountants.
I'd be very weary of a web-based system, if your ISP goes down, you're hosed! I'd also be concerned about PCI compliance too.
I can run tablets off my system now, but no need since we are counter service