In all honesty with the amount of times I have lost my keys I would be afraid of using one of those. One slip up and your data is public knowledge. People lose laptops, how hard can it be to lose something that size? On another note, I am not sure if a biometric security could be placed on one of these, say a finger print (not a scan, but a type of mold of some type), or a physical password and logical password. Then, I would feel more secure about using these things. On the other hand I use a remote administrator so whereever I am, I can always access my computer.