Need some gadget help

A huge motivator for me are gadgets. I'd say i'm a gadget geek when it comes to workouts. Having these little blipping and blopping things measure my progress makes the workouts so much more fun. What i would like to know now is if you guys have some inside info on scales. I have a "regular" digital one, but would really love to have a scale measuring my body fat as well. I am thinking of a Withings WiFi - i know it is expensive so my question is: Is it really worth the price? Not just this one but getting one that measures your body fat? Is it worth it or should i just do the same thing at my gym once a month?