I have used one of the Panasonic cordless irons for about 2 years now and I'll never go back to corded! It's not perfect - it only heats up while sitting on its cradle so it can cool down on you if you don't put it down often enough. But that small drawback is totally worth not dealing with a cord anymore!
It has a detachable water tank, so refilling it is a lot easier. I can leave it heating on the cradle while I fill it up and then click the tank back onto the body and it's good to go! It also has a retractable cord and a heat-proof lid that latches onto the cradle, so it can be taken to classes or even stored in a cabinet without waiting for it to cool down. Very portable, for being a full-size iron!
Definitely my most favorite iron ever. If it ever dies I will buy another one just like it! I should watch the prices and see if I can grab a backup on sale before they stop making them, in fact.