I would recommend the R3 Mindset Detox to everyone -- whether interested in losing weight, changing their diet or not.

It teaches you a lot about yourself and your patterns.

Personally, I started the mindset detox feeling like my thoughts were quite positive-- using positive mantras, affirmations and sharing inspirational ideas throughout my day as a yoga student and instructor.
However, I also quit smoking AGAIN just a couple days before beginning the mindset detox. (because it obviously doesn't fit into the above lifestyle among other reasons). 

I also ended another not-so-healthy short relationship during the mindset detox. It gave me plenty of new material & tools that empowered me. 
It's an interesting journey because some things don't hit you right at the time but rather you work things out in your subconscious throughout the detox and beyond.
The benefits, perhaps unsurprisingly, are that old life experiences that for whatever reason weren't processed constructively, get a chance to be addressed in a new light, using a new perspective and tools.
There were concepts learned that I can use everyday to make life a little bit easier and more rewarding- making me a better teacher with more to give.
There were times as a yoga teacher that I confessed to one of my own teachers that I felt I was going through the motions with things I once did with passion-- also times where I would step back into old life patterns I thought I'd overcome-- the mindset detox pointed out some areas where I was sugar coating things with affirmations and mantras more like a covering-- suppressing versus transcending-- while those tools are a huge step up from just wallowing in negativity, eventually the best gift you can give yourself is to sit down and get to really know your own mind.

~G.I. Jane
Kelly-Jane