Don't want to start a pissing match here, as the Geissele triggers are freaking great triggers, but the thing with a drop in trigger is that it is consistent, no matter what lower you use. Think about the physics/mechanics of a captured/closed system. There are slight trigger pin-hole differences, potential pin movement and possible pin wear hole wear on each lower - NONE of which are factors with a drop-in such as the WC trigger. It breaks the same as WC designed it to in the factory, every single time, in any rifle. Consistent, insanely crisp breaks. But yeah, pricey as hell. However, ZERO need for KNS pins, so take $25 or whatever off the cost of a no drop-in trigger.
The 3G is very light and fast - incredibly light and fast.
The 2 Stg is very precise and predictable - excellent for my precision guns.
The Single Stg TTU is the most insane break you'll ever feel, but slightly heavy at 5.5lbs. Wish these were around 4.5lbs (the very first SS TTUs were around 4lbs, but got a little heavier with the redesign.)