Well, I gave my review a little too soon. I bought it on November 13th, and was loving it. However, on the 23rd it stopped working. I was using it it, then it seemed like the battery was dead so tried charging it and it just never refired again...I changed coil heads, and all it would do is blink a bunch of times then turn off. Now it won't even blink.
I'm keeping my fingers crossed on the customer service of getting a replacement because I actually do love the way the device performs when it actually works. I bought it at a brick and mortar, so I'm going to return it once they open today. I'm hoping they just give me a new one, rather than have to ship it and wait.