@AndyC: You're misunderstanding the situation. They sell a box with two drives and a RAID controller. If one of the drives dies you're unable to access your data on the second drive unless you remove it and plug it into a PC/another USB bay, however if you open the box the warranty is void, and if you send the box in the data is lost - so essentially they're selling a RAID solution which is impossible to utilise unless you throw the warranty away immediately.
However it gets worse: Lacey have decided to exploit this situation by offering very expensive "data recovery" services which keep intact your warranty. The data recovery services likely involved plugging the working drive into a SATA connector and copying the data off.