If you do a search on this forum on Safe-T-Plus you will find lots of feedback from users on it.
But to make it faster, I had one installed 3 years ago before I did the steering bracket modification, for the tire blowout issue, and found it helped a lot on our '06. First thing I noticed is it reduced driver fatigue by reducing (not eliminating) wander, and took less pressure than before to hold the coach in severe side winds, or when a truck passed me during a crosswind and I had to compensate.
So the short answer for me is it helped the driver fatigue on my 300-450 mile days, which I get a number of, to make it worth the Safe-T-Plus for that issue alone. And although Alpines handle front tire blow outs well, it's an added safety factor.
Former Owner, 2006 36MDDS
2010 Arctic Fox 22GK Travel Trailer
2007 Toyota Tundra