I have a nice soldering station, but often times I'm not able to bring my work to it so for quite some time, I've been looking for a solid portable iron that I can take with me. I recently ran into a video about the TS100 soldering iron. I purchased one shortly thereafter and it has exceeded my expectations. It is portable, heats in seconds and even can run on DeWalt 20v batteries with the appropriate adapter.
Links:
How to update TS100 Firmware
TS100 Soldering Iron | Install Ralim Firmware and Custom Colored Case Shell