No brainer - I returned the first pair of Edge boots I got in, without even putting them on a horse. They are way too heavy for any horse of mine, and if I won't put them on my own horse they sure aren't going on a client's horse.
No, at this time there are no pads available that are designed to fit the Glove, but you can try using the Thinline pads. The Glove is so soft and flexible that most horses don't need pads in them.