Been running Xt/SLX levers with saint/Zee calipers for about 5 years and it is a great combo. Certainly a lot of power if that is your thing. Grabby for sure but that has never bothered me. At 205lbs I want the power and the Xt/Zee option works awesome.
Note I have not been able to see/find a difference between saint calipers and Zee calipers, other than pin versus bolt to keep the pads from falling out. As a result I stick with Zee calipers for the savings.
I like the combo so much that when a recently built a new enduro bike from scratch, I built the brakes using Xt levers, saint cable, Zee calipers. Awesome build.