I am using one (this model) provided by my work. I personally don't own it. However, I would love to own one of these as these things are amazing. They're expensive, but they heat up in seconds, the tips can be changed quickly (like you change the temperature. There's no dial), and the thing will last for years. I've been using it at work for almost 4 years and it's great. I've honestly been putting personal projects to work because the soldering iron I have at home falls far short of these HF soldering irons. Can't wait to move to a new place in May and buy one of these.