i have just bought a unit of the exact same X craft 250 black colour.
n i found that the Press&Go feature really works. However, the auto-run setup wouldn't install the additional component needed to listen for the "Press" to start the "Go" part.
Look for an "Application" folder inside the driver CD provided by CoolerMaster and then look for "GPIO". Run the setup and reboot. Press&Go would work after that, provided you have ran the backup program initially to configure what to backup.
Hope it helps, as I was also almost on the way to send the casing back for RMA. But just to found out about this.
Frankly, I am terribly disappointed with CoolerMaster's product. This will be the first and last CM product that I will ever buy. I had a few others 2.5" external casing from hotway (Smart Drive), which has a better price to quality ratio. Performance wise, X-Craft is about 3mb/s behind hotway smart drive. however, in the hotway i have a hitachi 5k100 80gb while in CM i hv seagate momentus 5400.3. theoretically, 5400.3 is supposed to give better result. hotway is retailing at about US$10 at my place and CM is about US$20. The only thing that is better between the 2 is that, hotway's aluminium heat dissipation is still behind CM, with CM's surface feels ice cool when in air-conditioned room while the hotway feels "just nice".