I've not been able to use the track saw yet.
I've been hanging huge boards of white oak 10' x 8" x 3/4" with a lot of pre drilling and drilling into steel studs.
I've been up in 10' ladders with both m12 impact driver and drill hanging from my belt or pockets while my coworker is having a hard time handling his dewalt 18v set. It's a real time saver, efficiency improvement and they are so light that I don't get tired from them.
The battery lasts more than the 18v dewalt but its newer. And power wise, nothing to envy an 18v.
Mind I have the "brushless" "fuel" set, not the cheaper combo pack.
I spent about 300 bucks in combination while the cheaper weaker versions of m12 drill and impact drier go for about $129.
Besides that, my drill/screw caddy is way lighter and easy to carry around.
I'm very happy.
Oh, I have not used the m12 multitool yet.