I think its kind of OP too, but only if one seeks to go from point A to point B quickly. Say you want to go around exploring a number of areas for items, I think a golf cart is a better choice. Basically all I would do to balance the glider is limit is infinite flight potential.
Golf Cart - Kelvin doesn't glide with you, nor uses a Knight V, best transport for our boyfriend while rocking out. Knight V - Great hunting assist vehicle, and fantastic for traversing within the local vicinity. Can still rock out. Glider - Long distance travel, no rock allowed.