Is it cool? Yes, during normal usage it remains at around 50 C and I've seen it at 70 C when I was doing a couple of things at the same time. It's still ok to touch at that temp. I've not encoded a movie yet though so I've not had a chance to stress it. Edit: Temps seem to hover around 42 C to 51 during light usage like arguing on the internet. Is it silent? Yes, I cannot hear the fans in normal/light use. I can just hear them if I put my ear right against the enclosure. What SSD Model? It's a Samsung. The MBA has SATA III, but the drive is SATA II Is the SSD "fast"? Yes, it's pretty fast. It's fast enough for the typical user. Hyper-Threading and Turboboost?