That's what I have and it's great! No exhaust to waste the hot air, just a water outlet/reservoir. It's maybe a tad slower than a conventions dryer but it still dries an entire load in an hour or less, for way cheaper.
The other factor that makes a massive difference is having a washer with a high speed spin cycle. Mine is 1200 rpm but I've seen up to 1800 rpm. Even 1200 rpm squeezes out way more water than your typically slow top-load machine.