Can anyone tell me what would happen if I installed Ubuntu 9.04 on a usb stick? I mean directly, not through Unetbootin or LiveUSB creator. Is it safe for the system? Would it be a LiveUSB (i.e., would it work on other machines, not the one I installed it from)? Would it take more/less space, would it be fater/slower than traditional LiveUSB? Other advantages/disadvantages over a LiveUSB install?

Thanks in advance.