I sure like mine. My buddy with a 336CS took my Happy trigger and stoned his factory trigger to near identical dimensions and made his about 85% as good as mine for free. We tried to get his to trip like you did and his would not either.
My very first time to the range with my HT installed, I let the first one go prematurely a little before I was ready.
It wasn't really an ND because I was preparing to shoot and had it pointed downrange and all but it did get my attention. I love it, you just think about it going and it does! So if any of you fellahs get a HT, be extra careful until you get used to it.