I started thinking about it and felt I should get serious. A back tension release is used primarily to cure or at least help with target panic. Since I have never experienced this and being a finger shooter, I never saw a need for one.
I worked closely with a young man who had a terrible case of it. He got a back tension video that I made hinm throw away and we started working. First I had him shooting at a cotton bale at 3 yards with his eyes closed. For two weeks, that is all he did, concentrating on using his back muscles. I was slowly able to work him up to shooting 2" dots at 20-yards and he progressed from there. It took three months, shooting five days a week, from 20-40 times a day to get him to normal and once he was there, he went back to the regular style. As far as I know, he has never had a prblem since.
In my experience, target panic only occurs in people who shoot targets a lot. By a lot, I mean up to 50X a day. The problem being, you over concentrate and then start second guessing. This is all done subconciously. When I was testing bows, I often shot 100X a day but accuracy was not a big thing so I was never bothered. My job was to simply evaluate overall performance, not accuracy since that is the human end of things.
Just for testing, I shot a tension release for a couple weeks and could see the advantage of it for a target archer with a chance or case of TP. For hunting, I felt it was a handicap and required far more time than the average hunter has to spend shooting. I am a uge advocate of KISS.
That is all I was trying to point out. In testing and evaluating archery products for so many years, I often was troubled with the "building the better mousetrap" syndrome. For example, except for testing purposes and with only the hunter in mind, I never shot a release, used a stabilizer, trued a peep, saw a need for more than two sight pins or had any desire to shoot the fastest bow on the block. But I was soley a hunter, concerned only with hitting a softball size target and with no concern for a tight group. I only wanted my first shot to hit where I aimed every time.
Over the years, I coached or taught scores of men and women to shoot a bow. I taught them my style and let them proceed from there. Almost every one eventually had a release, a sight with 100 pins, a variety of stabilizers, peep sights, the fastest bow made and trouble killing deer.
The day I finally admited I had to go to a crossbow, I actually cried. The bow I hung up, had one pin-set dead on at 25-yards, no peep and shot a blistering 256fps. The last animal I killed was a fair bull elk at 45 yards. My 125gr. Thunderhead hit right where I aimed. In five years, I have missed more deer with a crossbow than I did in three decades with a vertical. Guess I'm just not a techie. My wife and I estimate I have killed around 300 animals with a bow. I won one tournament and that was because nobody else could shoot. I have never been a 12-ring shooter. However, I was perfectly comfortable taking a running shot if the conditions were right. I can't recall ever trying to stop a deer or any animal that not going faster than a trot. I saw no need to and still don't, even with that cussed X-bow. Obviously, for me, a back tension release was a severe handicap.
Final word on the back tension thing. If you are not having trouble with your current setup, why change? If you have TP, go for it.