I started Leangains about 6 months ago after returning from a cruise with my GF. After seeing photos of me during the cruise, I realized that not only was I way flabbier than I'd like to be, but that my lifts were stalled, I was dealing with inflammation in both knees, and I was in serious need of change.
I had been doing mostly low-carb, high fat, high protein for a good couple of years before that, and I had little to show for my efforts. I also ate 6-7 times per day, starting at breakfast. The bottom line is that I was taking in too many calories and I didn't understand anything about nutrition.
When I had first learned of LG, I pretty much immediately wrote Martin off as some skinny wannabe pretty boy. Sure he was ripped, but I didn't want to get ripped if it meant being a weakling. However, after reading more into it and seeing the results of his and his clients, it became apparent that it was worth a serious look. I think I found LG at the right time for me. If my lifts hadn't been stalled, if I hadn't been chubby, and if I didn't generally feel lost/like shit, I probably would've never tried it. However, I figured I had nothing to lose and told myself I would stick to it for 3 weeks. I told myself that if my lifts went down or if I started looking skinny fat, I'd ditch it.
I was amazed at how quickly my body adjusted to daily fasting. I'd sleep in later, wake up, grab coffee and go to work. No mental foggy-ness, no physical fatigue. Within 2 weeks, the bilateral knee inflammation that I'd been trying to fight off for more than a year and a half had disappeared, and my lifting sessions were beginning to have that "pop" that I hadn't experienced in a long time. I ditched my food log and instead just focused on getting in enough protein and alternating carb heavy/fat heavy days (protein+carbs on training days, protein+fats on non-training days). The entire process was simplified and training started to be fun again.
Since then, I've lost a total of around 27 lbs of scale weight, and my my muscles are much more clearly defined. My arms look so much more vascular and I can actually see my top 4 abs. All of my lifts have increased.
I'd say without a doubt that starting LG has been the single biggest improvement to efforts since discovering 5-3-1 way back when. I feel that the traditional 6+ meals a day method is great for some (most of the serious people I know do this), but for me, LG saved the day. It put me back in the driver's seat, so to speak.