Dust buildup in speaker mesh is annoying after few months. Get something with removable grilles or at least easy access for cleaning if your room gets dusty

worth checking before you buy whether the glider is locked to its own proprietary transmitter or if it takes a standard receiver. A lot of the RTF bundles come with a basic 4-channel TX that you'll outgrow in 4 months, and then you're either stuck or buying a new radio anyway. If it accepts a standard receiver from the jump you can upgrade the tx independently without rebuying the airframe