just letting you know, 3 out of 5 friends of mine who run Tazer on their FCA products and use functions that require Tazer to be hooked up full time ended up having electrical gremlins.
one had his jeep died completely on a steep off camber trail and had to unmarry the thing and unplug it at the worst spot ever just to get it to drive normally again.
another one was getting all kinds of electrical issues, ranging from flashing D on the shifter in a mountain pass to loss of power on the freeway on separate occasions. I checked all his wiring harnesses (he previously had one of those powered steps and I removed for him and reconnected all the stock wiring harnesses) and told him to unmarry and remove his tazer and see what happens. No issue since.
the third one happened on a Power Wagon with under 1000 miles on the clock. tazer caused the voltage meter showing 15v while engine's running. unmarried and unplugged, no more issue voltage reading normal.
i ended up doing all their tire size changes and tire pressure threshold changes using my alfaobd. no issue at all.
so if you're gonna run tazer and leave it in there full time, just know these could happen. now, with that said, some Tazer enthusiasts will say "mine's running fine" and i've seen many that run fine, and seen many that got issues. just want you to know that there's a potential of the problems, and ultimately you make your own decision.