I don't know about whether the Dodo Juice wash mitt is better than microfibre or not (though, everyone says microfibre is the way to go these days), but it's made from Merino wool, and from what I've read, it'll soak up a regular 10L bucket in no time, making it a bit wasteful of your car wash shampoo etc (as you'll need a 20L bucket of solution instead of 10L).
I have one of them as well. I quite like it, but I prefer the Aquatouch one.
Aquatouch Ultra Microfibre Mitt
I prefer that one over the Mint one. My girlfriend prefers the Mint one! You need two anyway (one for your wheels etc). So just buy both, use both on your paintwork to start with and see which one you like most, and then demote the one you don't like to cleaning your wheels and chrome pipes etc.