With the Centro it was pretty amazing when they dropped a maps application later on - as it didn't have GPS. In built up areas they managed pretty impressive accuracy just by cell tower triangulation.
Nokia's N-series had GPS, Wi-Fi, and good cameras years before that and it was hard to lose all of that; Symbian had proper multitasking, persistent storage, and Unicode support; and between native Symbian and J2ME apps, the software ecosystem wasn't half bad either.
Aesthetically, I'll always be a fan of Palm OS, but I couldn't bring myself to actually use it as a daily driver due to all of these limitations.