I love them. Had a grade 1 for years, purchased a grade 2 and sold my grade 1 to a good friend. The short lever throw is wonderful. There is a trigger "kit" for them, changing of a spring (or two). I am not afraid to do it, just been too lazy.
I have a gloss Leupold 4x rimfire scope mounted currently, the short upper receiver is a challenge with the long eye relief of the scope. 99% of the time it is the opposite condition.