Coming from the Cingular 2125, there wasn't the learning curve for WM5, but it is a lot different that regular cellphones, so bear that in mind when thinking of giving this phone to your mom or tech-challenged signifigant other. If you've used other smartphones before, you'll find this one to be familiar. Appearance: the phone sports a nice combination of metal, plastic and a rubber grip surface near the tips of the phone. The external Windows Media controls are a great plus, but depending on your case (or lack thereof) you may need to disable them...luckily, you can do that. The internal screen is identical to the 2125 at 240x320 pixels and is very readable, except under sunlight, however few newer color cellphone screens are. The external screen is great and VERY viewable even in sunlight.Performance: The 200 Mhz TI processor handles most tasks nicely. I have not seen the incredible slowness that others have reported, but this phone is a smartphone running windows...it's not going to be as fast as a Series 40 Nokia for example. That's kind of like comparing DOS to Windows performance on the same PC...more overhead in the case of Windows Mobile is going to do that. RF performance seems to be on par with the 2125, which is to say, VERY GOOD. The only difference I have seen is that I think the signal bars on the 3125 are calibrated differently than the 2125. A low signal area that had 2 bars in the 2125 have maybe one bar on the 3125 now, but the calls on the 3125 seem to go thru quicker and sound less choppy on low signal.Pros: good reception, slim and sexy like the RAZR (in fact some RAZR cases even fit it). WM5 support for DirectPush email.Cons: like everyone else has said...the non-standard connector and the microSD slot ender the battery. The microSD isn't really that much of an issue, as I ordered up a 1 GB card from NewEgg.com, and I don't think I'll ever fill it.