3rd party charging dock

Has anyone tried one of these?

www.amazon.com/.../ref=cm_sw_r_cp_api_i_c1kLDb5KGB27T

Curious when used with the F6 whether the HR sensor touches the dock base and if so whether the dock base surface is rubberized. Also, is there much weight to the dock and do you just pick up the dock to remove the watch from it (assuming there’s not really a way to do it one-handed)