What are the best POS Systems today, for Retailers, and why?

The Best POS out there? I guess it all depends on personal preference at the end of the day. GAAP, Pilot, Micros, Cosmos and Kingpos, (South African POS Systems) all good programs, all have their pro's and con's. But then again, most of there are more for Hospitality/Restaurants more then retailers.

As per my experience, best POS System is SAP. It had been used to some renowned companies here in the Middle East and in the Philippines as well.