I've got one with clicky blue switches, which is fun to type on but a bit loud, and one with silent red switches, which is pleasant to use but the key activation is perhaps a bit too light. I sometimes find myself pressing the keys when I thought I was just hovering my fingers.
The folding stands are a weak point. The MS 4000/Sculpt sort of design, whereby the riser is a solid piece of plastic that the keyboard rests on, is much better.