My HP DM4 notebook sits comfortably within interior cooled metal grid of this device, that provides almost silent, but yet audible, cooling. No setup required with USB cable provided, perfect for my purpose as it means the fan switches on/off with the notebook. As I use the cooler taking power (tiny I imagine) from the laptop the on/off switch at the back can be left on (pressed in) at all times. There is no draught on fingers, insured by rubber seal strip at front edge of metal grid, that is inside quite a substantial and reassuringly solid (no creeks or squeeks when lifted with laptop on) plastic surround. Having had both a Dell and HP fail due to overheat issues in the past, it is reassuring that my notebook internal fan is no longer cutting in with it's impression of a hair dryer. Overall probably the best office buy I have made in recent times. Highly recommended.