I got some TS+ strings when I bought my Robertson. The strings were made by 3 Trees and very well made... that said, I reset my bh quite a bit... does ts+ have a lot of stretch?
I have never had a TS+ string. I do have TS-1 strings on all of my bows. I know they changed something in the formula along the way from TS-1 to TS+ but I am not exactly sure what it was. Once my strings were set in they haven't changed since. I found TS-1 to be the quietest string material there was which is why I like it so much. Dick himself even commented several times about how quiet my Gozhawk is with the TS-1 string is on it.
Joseph is right about the lack of noise aspect. But, like you, I have found it to stretch a bit for a period of time. Knowing that I check the brace height regularly until it gets "set in". I like how the string shoots and the lack of noise. I shoot it on my DAS bow and set up my wife's DAS with the same string material.
I put mine on yesterday from 3Trees and probably put about 75 shots on it and the BH hasn't moved a whole lot, just 1/16". Great string! Never had TS plus before. So far so good.
Scratch that lol. It's 5/16th low now. hopefully when it sets it's set!
Depending on how the string is made and the number of twists, it can take a bit to settle in.
It does creep more than some of the other low-stretch materials, but it seems to make the quietest string for my bows.