Did a search on true talker and it comes up as Hunter's Specialties??
This is a great topic because I've them work and I've seen them spook the heck out of deer.
I personally carry an assortment of calls.
My grunt calls I use the HS True talker and the Primos Hardwood Grunter.
The HS is great when the deer are close. Its not a very loud call, so even if they are close you cant blow it too hard. If the deer are at a good distance away or you doing a grunting and rattling sequence, the Hardwood Grunter is perfect cause it's pretty loud and it can carry pretty well through the woods.
Now the can calls, I've tried the Primos and the Flextone and they are similar, but I have never had any luck with them. I surely have spooked plenty of bucks using it as a last resort. Trying to get their attention and only doing the opposite.
Either way, try any call you buy and see what your deer do... Report back, cuz this is a great topic.