After first 100 rounds...the Limited feels great in my huge hand with the extra large magwell serving as a "shelf"...the Combat Master is fantastic...great trigger. The smaller STI would make a great EDC and STI did trigger work on it. The flat trigger is great.
The Sight Island is interesting. Seems to keep sight more quickly back on target.
I was shooting strings of fire at five round bursts. Guy in shooting bay over thought I was shooting a MP 44. They are amazingly fast shooters.
Here is a demo of the speed of the STI trigger group in the Taran Tactical John Wick 3 Combat Master. Crazy fast. 21 shots in 3.2 seconds, with split times of .11 to .14 seconds...best I could manage. Video link: