I bought a Stafix this spring it's a 12 Joule (X12i) 90mile/500 acre with a remote shutoff. The remote shutoff worked the first day and hasn't worked since that day, but it is a great voltage tester. I just haven't called to see what I need to do to get that to work. I have a Cyclops 12 joule and it seems to be a hotter charger than the stafix. I believe they are both made by the same company now. Both are supposedly twice the size of charger I should need, but the grass load on the fence at times pulls them both down. I had 2 power wizards and they are junk. I used pells for years, but they aren't available anymore. Being shocked by both chargers I would say the cyclops hurts more, but both will curl your hair.