Datatech Labs was incredibly responsive — I sent two drives in Monday and they had them analyzed by Tuesday morning. They called me as soon as they had determined the cause of the drive failure. In my case, the drives were unfortunately physically damaged beyond any kind of recovery — the platters had been scored and the information was literally dust and no longer physically on the disks. They helped me track down the root cause of the problem, however, and suggested several avenues for compensation for the destroyed drives. They were gracious and did not charge anything for any of the analysis. I would definitely use them in the future if I had any data recovery needs.