I've never had a need. If my boots are wet at the end of the day, I just take the liners out and hang them over the back of a chair near a heater overnight. The odd time I've used the hairdryer in a hotel, that we before I clued in to taking the liners out...
I lay out my stuff in front of the gas fireplace as soon as I get home. But I have been considering getting something anyways, especially for boots. Saw this one in a recent Harbor Freight circular: Four Post Boot and Glove Dryer
I've used these with a lot of success. I have a dc outlet in the trunk of my car so by the time I get to the mountain (30 mis) they're dry and warm. The only gripe is that the wires ran straight out the back and it puts pressure on them until they eventually break. It looks like newer models have the wires running out the top to correct this issue.
Well this was a total surprise. My uncle got the boys a cool unexpected gift for Christmas.
Each boy got one now I don't need to worry about drying all our gear. They can put them in their rooms and out of sight and dry. Way cool and thankful