I've got 2 stage LMT and RRA triggers.
Based purely on what I've read about both on these forums, I'd be a lot more worried about my RRA going "single stage", complaints about the LMT triggers are rare, perhaps they have superior hardening. And if the RRA trigger malfunctions, the posts here on "tuning" it would be very useful.
In actual use, my LMT triggers are superb, never a problem. The one WES at MSTN picked out of a LMT lower for me is particularly nice, almost as good as my KAC. The other is just simply a great 2-stage trigger from Denny (many thanks). With either, I have never noticed any slap, doubling, loss of the second stage, or any other problem. With very light occasional lube, 1000's of rounds later both are a pleasure to use and very smooth.
My RRA is "low mileage", but it is also very good (came in a RRA lower from Pete at Legal Transfers), and was a bargain.