I installed the 30gb version into my w520 (320gb regular hd). It's primarily used to store documents/images and a virtualbox image. I also have 4gb set aside for ReadyBoost. Virtualbox is pretty speedy. Copying a 3gb file from a USB 3.0 flash drive to the msata in Windows 7 runs about 80mb/sec. I've seen burst up to 200mb/sec from the USB drive to the msata. So far so good. It was definitely under $70, shipped.