I would have to say I’m also in the lms group. All 3 of my eco’s are down by them. My 3.5 has been running full bolt one with meth since day one. It’s at 200,000 now of very hard miles. Lots of drag strips. Street fun and towing. It’s been very solid. My edge 2.0 now has 50,000 miles o. It and I’ve been on the e30 tune for about 40,000 now. No issues at all. Even ran it for several with the cruise set at 120 while in Mexico.
It’s been rock solid and easy to use my wife blend her e30 and has no issues.
My Rs has very few miles but I average 6.8 mpg over the 6,000 miles it has in the tune so it’s driven hard and held up to that. Not enough miles to know long term on that one.
Very simple to use and very reliable.