I'm doing SW at the moment and losing about 2lbs a week.
Their newer plan is called extra easy. Basically there are some things that are free - fruit, veg, lean meat, fish, poultry, etc, as well as pasta, rice, couscous and potatoes.
Then you get choose 2 healthy extras each day - stuff like milk, cheese and grains. This includes 2 slices wholemeal bread - so if you wanted to, you could still have a sandwich every day.
Then everything else has a "syn" value. People get worked up about it being called syns but it's just another name for points that someone donkeys years ago would be funny. Everything else has these syn points, and you're meant to aim for 5-15 syns a day. So that covers things like cakes, chocolates, sauces - everything really. So if you wanted more bread, you could also take it out of there.
For me, at the moment, it's working fine. I've lost lots of weight with Atkins before but I put it all back on again because, bottom line, I always struggled to cut out carbs. Interesting that someone else felt SW was more faddy than low carbing - I think it's a personal taste thing as this time round I felt the exact opposite - I just couldn't be bothered to buy and cook separate stuff just for me - on this my whole family eat what I do, but I just modify a bit - so for example we just had jacket potatoes, beans and veggie sausages, but I grated some full fat cheese on theirs and some reduced fat cheese on mine.
I know it sounds like bollocks but I genuinely don't feel like I'm dieting on this and, like I said, I'm losing about 2lbs a week. And in the last few weeks I've been away on a conference eating catered food, had my birthday and been out for several meals including a curry AND eaten my way through some Easter egg! So I've just found it allows me to continue with normal life and still lose. Which is what I needed at the moment, something easy. It's a bit slower than Atkins - 2lbs a week rather than 4 - but for me it's working.
There's a SW support thread on here if you look for it if you want to take it further. Really, I think the key is to work out what sort of head space you're in and go for something that works with that.
Good luck