Yes I have 100mm terralogic FIT f29 forks on my 29er hardtail. Yes they work really well in my opinion. I think the principle is similar to the brain technology, which I had on an epic before I went hardtail 29er but for some reason the terralogic works without any clunkiness of lockout release. Its as seamless as I could ever want, to the point I cant feel it at all. Not cheap, not massively light compared with some SIDS, but if your concern is the feel of the Terralogic function, then thats the least of your worries, as for me thats been great.
Yep your exactly right about the benefit of faffless riding. Just get the Terralogic threshold about right, which is really simple. Then leave it be and get used to riding without having to faff with anything. Happy days 🙂