Thinking of trying LCHF (low-carb, high-fat) Has anyone had success with this way of eating?

Yes, I lost 50 lbs eating LCHF, and have kept it off for three years. I have a family history of type two diabetes and some signs of insulin resistance, so it makes sense for me. I also happen to love the food (all manner of meat, pork, poultry, fish, eggs, innumerable cheeses, full fat yogurt, heavy cream, butter, an abundance of fibrous veggies, low sugar and savory fruit, seeds and nuts, very dark chocolate, etc). Being in maintenance I can also work in small amounts of starchy veggies, higher sugar fruit, and grain (though I still keep those in check, as I find my appetite increases dramatically when I over do them).

I do allow for a "cheat" meal (meal, not day) once or twice a month, for added flexibility and to allow for social situations where low carb eating may be more difficult (cake on a birthday; pie on thanksgiving; my MIL's lasagne that she only makes a couple times a year).

I was able to keep my calories low enough to lose the weight, without the nagging hunger that a higher carb diet always left me with. It still comes down to calories (I recently put on weight, on purpose, while still eating LCHF, so, yes you can gain on low carb). But for me, low carb makes adherence easier, and deficits less painful. Check out the low carb forum. Lots of helpful, knowledgeable folks over there that can help you get started! Good luck