I had a micro. It pissed me the hell off. I could never avoid getting dust between the faceplate and the screen. My DSL and the SP? Their plates were attached with adhesive to the LCD itself. Unless something went horribly wrong, you could take them apart and put them back together multiple times without ever having to worry about dust.
However, the micro was good to me...up until the scratch appeared on the first faceplate, forcing me to put on a new one, thus starting the chain of dust, clean, dust, clean, etc.