Seems fine on mine, doesnt get hot to the point its a problem. It does vibrate ever so slightly but thats to be expected!! It has a different feeling depending what surface its on, different types of wood for example, just worried myself now thinking my Macbook Pro likes different wood, ok lets not go there!!
In all seriousness thought I think you should be fine, dont worry about it unless your Mac is going into meltdown!!! 😀