High marks for small size and usability of the buttons. Menus were quickly learned even with only intermittent use.Battery life is far far less than what you are led to expect. I live where there is a consistent, very strong signal which should be near optimal for battery life. Sitting powered on, but totally unused, the battery goes from fully charged to totally discharged in 80-130 hours of "digital standby time" vs the 250 hours claimed (3-6 days vs 10).The connector uses the same shell as a range of phones from other vendors (LG?), but the pin-outs are incompatible. Worse yet, Pantech is unwilling to provide this information (I sent queries to Support twice and they neither replied nor put it on their FAQ). AT&T;/Cingular makes this information "available" via a posting by a customer on one of its forums.I have several charger kits that have interchangeable connectors, covering a wide range of phones. I have yet to find one of these kits that handles Pantech. Aside: the reason I like the kits is that you can share: for example, if a passenger in your car needs to charge up his phone, a simple switch of the connector handles it. You can get a lot of "brownie points" for this.Although data cables for the C3 have recently become available, they come with major caveats (enough to discourage me for the time being). Reportedly the software can be difficult to install, additional freeware is need to do anything useful, and you cannot modify your phonebook or calendar, only back them up.I like to carry PDFs of manuals on my laptop and/or PDA (a Palm). The Pantech manual lacked the markup needed to be usefully converted for the PDA. An email to Pantech on this has gone unacknowledged.I got my C3 in late December 2006, as the local AT&T; stores were transitioning from the C300 to the C3.