I think you'll like them.
I've never used their ejector/extractor spring. I wouldn't mind picking up a set for each of my AR's. (Yes, I have that much confidence in them)
I don't believe they made them when I first started using their buffer springs.
I just bought 2 sets of their buffer springs a couple weeks ago
My lightweight coyote popper was just a little undergassed for the tubbs spring and wouldn't lock the bolt back on the last round, but functioned fine otherwise.
So, I put the standard Carbine spring back in it, and put the Tubbs spring in my middy/rifle stock. (The one I had to enlarge the gas port size).
I believe it will function well in it, and I kept the other in the SBR AR. It functioned fine and even has an H1 buffer in addition to the new spring.
I'll test the middy/rifle stock combo with the new spring to ensure it works as it should with before putting it back in HD rotation, but I think it'll be fine. It felt good cycling it by hand at least.