Well, I'd be nervous if I didn't have the clip installed on the left pin in your picture...
But the first time I used it, nope. No worries at all. Once I saw just how stupid-over kill the design is, I never had a worry. If you think about it, there's actually not much force at all put on the TRS itself, as the weight of the bike still sits on the tires, all it does is really just keep it balanced.
The first trailer I had, it had 2 TRS systems. My enclosed trailer had 3. My toy hauler has 4. If you add up the transportation miles from each individual bike, I would easily have tens of thousands of miles with the TRS system. Out of all the things that go through my mind when I'm driving to the track, the Pitbull TRS is nowhere near on my radar of concern. That piece of mind, along with the super easy unloading/loading capabilities it gives, makes it worth the price of admission, without question.