Pros: It's a PDA & phone. 'nuff said
Cons: Battery life is poor. Sound volume on speaker phone/ringer is very low.
Summary: Battery life is semi-fixable with after market batteries, although with bluetooth and EVDO cell service, battery will still need to be charged daily. You can get around this somewhat by letting the phone turn off after so long idle, but response time between first ring and bluetooth headset doesn't initialize until 3-4 ring, so may miss calls.
Ringer volume is really low, but is fixable with downloaded rings. Speaker phone volume is also very low compared to other phones. There is no fix for this.