freitasm: Android and Windows Phone both do tracking as well, it's not an iPhone only thing.
Fitbit is great because of the gamification angle: friends list, competition during the week, etc.
I have a Fitbit Aria WiFi scales at home and by just walking (and replacing Coca-Cola with Coca-Cola Zero) I was able to lose 9 kilos in the last few months. When there's no Coca-Cola Zero I drink normal coke. Not a completely "OMG, I can't have this or that". I still eat the same as before (meats and pastas being the main staple) but a bit less. And walk an average of 12,000 steps/ daily.
The problem with the Surge is that it's not a good looking watch. It's actually a tracker, it just happens to show the time. You could easily keep it on the right-hand while wearing your watch on the left hand but people will ask why wearing two watches - just tell them to mind their own business.
I wouldn't mind the Withings because that is a good looking watch and would be happy to wear it to a formal occasion or daily.
Swiss company Mondaine have a very nice looking Helvetica Smart watch coming out that you may like (depending on how much info you want). Expensive - only price info I found so far suggests "around US$900"