If you're looking for a more technical review of the iphone, Arstechnica posted their extensive iPhone review along with their own stress testing. It's hard to provide an all encompassing summary blurb but they leave the reader with these pros and cons:
Pros:
Web surfing experience is superior to other phones
Overall SMS experience is great
Practically non-scratchable
Looks fantastic in every way
Easy to use, self-discoverable
Soft keyboard is definitely usable
iPod interface rocks
Cons:
iPhone is currently locked to AT&T
No worthwhile Exchange support
No wireless syncing over Bluetooth or WiFi, must tether via USB, no modem use at all
Extremely quiet ringer/alert/speakerphone volume
Windows version of iTunes cause a few hiccups
Application support is weak
E-mail implementation feels weak, uninspired
