Excellent service and advise provided by Shoiab Jillani of Disk Doctors London. Restored Raid 5 array with two failed hard drives out of 4, on a Buffalo Terastation (23 months old!!), with 100% critical data recovery. All completed within 3 days. Offered to work Saturday as well as Sunday. Had been advised by Buffalo Support to go to Kroll Ontrack who gave me a 30% to 40% chance of data recovery. Shoiab gave me completely free and impartial recovery advise and options on other units, such as USB memory, 3 other Buffalo Terastations (only 14 months old!!) which had two failed drives. Seems Buffalo are in the habit of providing cheap desktop hard drives on NAS units which are meant to be on 24x7x365!! Buffalo told be literally to go away and Disk Doctors bailed me out with 100% success!