I did WW and My Fitness Pal (straight calorie counting) for about 1.5 years and lost about 35 pounds. Then I did (and am currently still on) Medifast 5&1 (5 meal replacements and 1 "lean and green" meal/day) where I lost over 70 pounds in a year. I love Medifast and could go on for days about it. The MF diet is very low calorie (less than 1000cal/day), low sodium, low carb (this is a ketogenic diet). For most people on MF, despite the low calories, they don't feel hunger after the first 3-5 days thanks to ketosis. I lost most of the 70+ pounds without exercising but recently started working out and running. To fuel for workouts, I switched to the Medifast 4&2&1 plan which increases the calories slightly, ranging from 1000-1300/day, still low carb and keto-inducing.
There are 3 ways to do MF. YOu can join a center and pay around $1000 joining fee PLUS the cost of foods. The second option is to do it alone by ordering the meal replacements from the Medifast site, or ebay or
Amazon. The necessary information on actually doing the diet is floating around the internet in PDF format. Finally, (and this is my favorite way, having done all three) is using a health coach through Take Shape For Life (TSFL). You pay nothing more than the cost of the MF foods which you order through your health coach's site. If you pick a good health coach, you have someone you're accountable to, who offers support and information along your journey. My coach has weekly Facebook group chats, in addition to regular personal emails and texts.
I'm a firm believer it doesn't really matter how you lose the weight, it's what you do to maintain the loss that's most important. You can NEVER eat the way you used to and for some people, they can NEVER eat the same types of foods they ate before. For me, I need to avoid ice cream, cakes and candies for a long time, years maybe. Otherwise I start rummaging for more of that stuff and frankly, there's never enough to satisfy my cravings. I believe everyone who loses weight needs to workout regularly, or severely restrict their calorie intake for life. Since most people find severe calorie restriction a bummer, regular exercise is almost essential.
(As a side, Bumber, congrats to you! I remember you from way back when you started your journey as I too was starting mine. I'm so happy we both "made it", lol! It feels so unbelievably good to be a normal weight, I never would've imagined it could be this good. How about you? And look at us, running 1/2 marathons!! 4 years ago I was terrified of the thought of running a 5k!).