Had my 5 since last Friday. Beginning to have buyer's remorse.
The battery life is a real disappointment. Also, in my household we have iPads, iPhones, iPods, FM transmitters/car chargers, docks... so there's tons of connector cables around that doesn't fit the 5. Also I can't just charge my iPhone anywhere, since everyone still has the old cable.
I wish I hadn't jumped the gun so quickly and sold my 4. I'm debating whether or not to sell my 5 and just get a 4s. Either that or get a few cable adapters.