Question for people using TranSynd

[Beedee]

I'm thinking of changing out the trans fluid for TranSynd, I did a search and found that a few people with the older transmisions have swapped. Have you had any troubles since you changed. A friend of mine who used to work in a shop that did a lot of repair work on busses said that if I changed over to synthetic that I would develop seal leaks, so i have been sitting on the 4 jugs that I bought. My truck only has 130,000 km on it. I just bought a 22 foot travel trailer, planning on changing the oil out and want to use the good stuff that I paid an arm and a leg for.
Any thoughts???
Thanks for the help
Brian