I’m an above knee amputee. I am fairly mobile but I found it difficult to walk long distances, I googled mobility devices but all appeared to be seated only & targeting the elderly, which I didn’t class myself to be. I then stumbled across the DC TRI! Wow I couldn’t believe it, I could stand, it was cool, it was safe & I felt great on it. I now go everywhere, I’ve recently purchased a second DC-TRI for my wife!