I just bought the Geissele SSA trigger but have yet to install it. I am really looking forward to using it. The stock LMT CQB MRP trigger is awful...well, the one I have is.
Look at this graph from the Geissele website.......with both a stock AR trigger profile and the Geissele profile plotted.
The graph of the "stock AR" trigger profile looks just like how mine feels as I pull through. Not only that it is rough and grindy sometimes.....even with a little schprinkle of BreakFree in there.