Any success with 5:2 diet?

I have been on MFP for 90 days today and so far not had much success as I lost 4 lbs and have since somehow gained it back, although I suspect it could be muscle.

I've been working out for 6 days a week since a week after I joined and have been trying to find the right number of calories for fat loss in the correct macros (ie. protein over 100g, carbs generally under 100-150g) but due to lack of success I've decided to give this diet a go.

For most of my time on MFP I have been eating at TDEE -20% and am now trying to eat at TDEE -3500 calories so that I can lose 1 lb per week. My main downfall has been calorie distribution though. I started off trying to eat the same every day (around 1600) but I found that I overate at weekends due to long days/evenings out with friends and as I was training a lot didn't want to deprive myself on those days. I then tried to eat less during the week and save the extra calories for weekends but although I didn't go over at weekends by doing this I found that I was ravenous during the week and couldn't manage to stick to 1400 calories per day.

I think that for me the 5:2 diet will work well because it will allow me to create the deficit I need to lose 1 lb per week and I can eat 2000 calories 5 days a week with the other days being 700 calories. Today was my first day and I have found it quite easy and I'll have another low calorie day mid-week too.

I am looking for others who've tried other methods of distributing their calories but who've finally had success using this method. I saw the BBC programme about it last year and thought it sounded interesting then but at the time I wasn't focussed on my diet or health and fitness so forgot all about it.

After 90 days on this site and barely any fat loss (possibly 1% but maybe none as I know readings aren't always accurate) I am really not sure what else I can try. I've lost 2.5 inches in total during the 90 days too but I can't notice it much as it's only half an inch off my waist and 2 inches off my hips so doesn't make a lot of difference to how clothes fit, especially as my thighs seem bigger than before.

I have increased my weight training to heavy lifting rather than the light weights I did before on Jillian Michaels workouts and this week I'll start lifting 3 days per week too so hopefully that will speed things up.

Any success stories to motivate me will be much appreciated. I currently weight around 147 lbs with 31% body fat and I'm 5 foot 4.