Having a cordless soldering iron was a game changer when I was underneath the console of my boat wiring up a relay to send direct power to my depth finders rather than sending the full load through 30 year old 22ga wires and an ancient switch. Otherwise, I would've had to drag an extension cord across the driveway and screw around with not bumping the cord.

And yea, the glue gun is amazing. I've got the largest one that uses the big sticks, and it works great. Heats up quick, and doesn't make a mess. Doesn't tip over easy either.