"Worth the money" is an excellent question, and really depends on how
much money you have. Some people think that a Mercedes is worth the
money, some people think caviar is worth the money.

Personally, I think that the P900 is a fairly nice phone, and that
with Opera as a web browser, it's great. It has a very nice screen,
good sound quality, and a tolerable camera. Processor is reasonably
fast. I don't think that UIQ is a very well designed user interface,
but the other choices out there are PalmOS and PocketPC, so I think
it's the best among them.

The P910 is available in two versions, 850/1800/1900 and
900/1800/1900. Making a quad-band version would require redesigning
the RF board significantly. There aren't really all that many quad
band phones on the market yet. Tri-band is, IMHO, decent enough most
of the time.