The trigger - awesome - it really is hard to beat a fully adjustable Timney trigger - mine is just glass smooth and one of the reasons that the gun shoots so well.
Even though i havent shot mine yet, the trigger is amazingly smooth and light. I also cant believe how light the MK is for a full sized ML.
Field and Stream picked it as one of the top 50 guns of all time. It ranked 37 including centerfires.