I've got one of each of the Megs ones..... the lambswool one for most of the bodywork, then the Microfibre one (old one) for the "dirtier" areas, such as lower sills, arches, rear valance etc...... happy with both.
Although not needed to washing machine them yet. I use two bucket method and plenty of rinsing and so far they've stood up well!
Same as Jacko for me too i use the two same mits i would not use anything else