I gave the iDave diet a bash, ages ago. I wasn't particularly heavy, around 85Kg for 6' 1". During several months, I dropped down to 78Kg, but more importantly I had a feeling of much improved general health.
I just felt better. In addition to this, a small patch of eczema, which the Doc told me would only ever persist or get worse, actually cleared up.
(I suspect the eczema was a diary / wheat intolerance)
Since then I've done a fair amount of reading, debating and general homework on all this diet stuff and now follow a kind of iDave diet, primal pattern. Nothing too restrictive and I still get my chocolate and red wine in too.
Infact, on the odd occasion I'll still pretty much eat and drink anything I want to*. But the poor stuff doesn't become part of the day to day food choice. A lot of it, for me, was about establishing a sustainable pattern and list of food choices.
So, these days, I am leaner, I have increased muscle mass. I experience a greater feeling of overall good health. While enjoying the foods I eat.
I don't count calories, but I'm mindful of them.
Becoming aware of the insulin response, what carbs can do for you and that the provenance of your calories may be of some importance. Has meant that things have worked out pretty well for me, so far.
I'd also point out that its not just about the scales or the waistline.
Look at the OP's story, note that the B/P and cholesterol levels have improved. I'd imagine that these are better markers for indicating improved health.
Good stuff Ton !.
*: emphasis on the word want