I've been on WW since January of 2012. I also count calories.
When I started my weight loss effort, WW was
exactly what I needed. I had all kinds of junk in my attic about dieting and counting calories seemed overwhelming to me. I found the WW points system very easy to use and understand. I liked the wealth of information that is available on the WW site. I do online only. I'm not a meetings kind of person. But I've developed a small circle of good friends through my WW blog. Blogging really helps me to stay focused.
On the downside, I've been heartily disgusted more than once with website glitches. At one point it was so bad I almost cancelled my membership. But things there are improving although the site is still, IMO, not very user friendly and has more bugs than I like. I'm in Information Technology myself and some of the stuff I see on the WW site just drives me nuts! But still, I stay because I like points and I have my group of friends.
Having said that, I think that at some point I will give up WW and just stick to counting calories. I kind of think of WW as my training wheels that at some point, I'll get rid off. I use My Fitness Pal for counting calories. The web design at MFP is soooooo much better. It is simple and it doesn't tend to malfunction. It's also free. Bonus! However, MFP doesn't have the wealth of information that WW does and, well, I'll just say that I'm not comfortable interacting in their community. One reason is that the discussion boards over there don't have a last read function so when you try to follow a thread, you end up doing a LOT of manual scrolling. I'm also not comfortable with the level of snark that occurs there.