So I had a UEI/UTLDM2 that just stopped working out of nowhere. I sent it back to UEI because it was under a year old and they said it was dead and un-repairable. Good guy UEI gave me the option to get one of the new DM5xx models in replacement only paying a fraction of the cost of one new! I just received the DM515 today and only took it out of the box for a few minutes before going back to work. So far I can say that it's built extremely well, takes 2xAA batteries and is VERY fast in when not in auto mode (AC and DC share a switch position). I'll try to get a quick video review out soon. Don't expect Dave Jones or Joe Smith in depth review, but I can test all the functions with the tools I have.