I'd say honestly my results have not been as stellar as Doug or Chris on LeanGains. I believe you could attribute most progress to diet control versus timing and LG. Personally, I can manipulate my calories during the day and clean up things here and there to cut, or add in oats and I add weight (something about me and oats!). I wouldn't say I've had TONS more freedom than what I typically do.
On the other hand, I've remained relatively lean and added muscle strength back after my last severe cut. I wouldn't say my bf% has magically gone down just through LG, or that I've miraculously built muscle/recomp. I think it's following the normal pattern of managed nutrition and exercise.
Honestly, I will likely drop LG at the end of this in favor of my normal eating patterns. Missing morning meals really sucks on workout days, and my wife notices I'm more irritable/testy/on-edge when I don't eat in the morning.
In my opinion, LeanGains is a way for people to control the amount of calories they take in, I feel it's really kinda hard to get enough calories to bulk on LG. With meals spread throughout the day, it's a lot easier for calories here and there to add up without people realizing it. With LG, you get a much shorter period of time and thus more controlled intake of calories.
I've learned some things from it, but there are some tried and true methods out there that can be just as effective as another. It's really up to what works for you and what can you maintain control over. There's no "miracle diet" IMO, it's calories in vs. calories out and the macro/micro nutrients that go with it, and some slight play in timing (mainly around workouts).
So, long story short is that it CAN work but it doesn't fit my preference or lifestyle, and my progress has been nothing out of the ordinary. IMO if you have something that works for YOU, stick with it until you stop making the progress you want, and try something different.