I have a lot of weight to lose (5 stone) 
I have in the past followed Slimming World and had good results.
I’ve never tried calorie counting but I’m considering it.
Whilst I like the “free” element of slimming world, I don’t like that there isn’t really much emphasis on portion control.
I also feel like I eat the same food when following the SW plan and I end up going off plan if I haven’t prepped a meal or if I’m short of time and haven’t got anything quick to whip up.
So... SW / calorie counting? Why? Have you had success?