I got 2 905s from HG. They both got really hot for a few times, but stopped this after a few days. I used them for a few weeks and they stopped working altogether ( the light flashed a few times, but no activation). I have sent them back on warrantee, and expect new stuff soon. HG is my current fav vendor, so far they have done right, I expect a good resolution. Remember that many of the devices we buy are really more or less in the "test" stage. The good news is in general over the last year we have more and better products and choices, I hope this continues.