I needed a tumble dryer as I live in a small one bedroom flat with no outside space for hanging washing, and outside of the height of summer, my washing would sit on airers for THREE DAYS and still be damp!
This tumble dryer is amazing. I bought it mainly because it was the only one I could find that was narrow enough to fit on top of my kitchen counter while still having a good drum size, and I'd heard heat pump dryers were better. Fits loads of washing in and dries practically everything, even a full load of towels, in around an hour (the timer says 3 hours when I put it on, but it has sensors to detect whether the washing inside is dry and updates the timer as it goes and turns itself off automatically when everything is dry)
According to my smart meter, it also only costs me around 10p per hour to run! (on 15p a unit)
Yes it's more expensive up front to buy than a vented or regular condenser dryer, but it's so quick, efficient and you'll make back the extra cost in electricity saved pretty quickly!