I have both the sled and bags. I dont use the sled anymore. I feel as I have improved as a shooter there isnt a reason for it. When I first started shooting I had a jerky finger and I flinched A LOT! I think the sled helped me with those issues to an extent.

Now I breath better, squeeze the trigger and the majority of the time I dont even blink. I feel in total control.

IMO The sled was just a crutch. Once I matured as a shooter there was just no need for it.

But if youre someone who feels it helps you sight in then by all means do what you feel works best for you.