I had installed this one on a No.1V .223, for a short time some years ago. It seemed like a good idea, at first. But, when used set, lock time was increased noticeably over what is usual for a No.1 - kalunk.
On the other hand, when used unset, it acts just like a very smooth, 1-1/2 pound, short-stroke, double-action trigger, without adding to the lock time. So, it is much more practical on a stalking rifle, as in the classic European tradition, for both set and unset use.