It's working great and runs Ubuntu 14.04 perfectly. Remember F2 and F10 keys at bootup take you to BIOS or boot menu. The only minor problem I had was the screw on the mSATA location is awfully tight, and it took me a while to loosen it.I used the following parts and can confirm they are compatible with D54250WYKCrucial MX200 mSATA SSDhttp://www.amazon.com/gp/product/B00RQA6GF0/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1Crucial DDR3 SODIMM 204-Pin 1.35Vhttp://www.amazon.com/gp/product/B006YG8X9Y/ref=oh_aui_detailpage_o01_s00?ie=UTF8&psc=1