How long have you been using it? I see a few reviews saying it breaks after about a month.I bought amazon.com/gp/product/B00KI0BMMC, but you could probably find one cheaper. It was on sale when I bought it. Anyways, it hasn't had any issues yet. Any ohm reader with a 510 connection should be fine and easy to use.
Thank you for your help. I will do some more research but will consider this item.About a month... I have beaten it pretty badly, dropped it 6 feet on concrete, dropped 40lbs of plywood on it which shot it onto concrete, and it took it like a champ. However I just got back from camping and without any impact, the fire button came out. It is held by a threaded ring on the inside that is not attached. Think a nut. I can probably fix it by taking everything apart, but will try a warrenty claim first. It still fires by pressing the fire button on the chip, but it ain't purrty.