Hi delgirl I started doing 5:2 at the start of Jan, so far I've lost 3 stone 6lbs and I'm feeling fantastic! it's really opened my eyes towards eating and food and how I was approaching food before, silly eating for no reason and not knowing what hunger actually felt like, so I'd highly recommend it. It has lots of other health benefits too which is the other plus. Good luck if your thinking of doing it :-)
In a year I lost 50lbs, I did 4:3 but I also fasted every day until dinner. I tried to limit my carbs all week however I am vegetarian so it's very difficult to go very low carb but I stopped eating bread and pasta even though I had always eaten the wholegrain version. At first it was tough but it became easier. I feel like a new woman and it feels fantastic. Good luck!