I've been using this for cellulite on the backs of thighs and tightening of skin/reduction of fat on the sides of my hips. After using it twice a week for 2 weeks I already notice a significant improvement, the backs of my thighs are much smoother!
However, the time estimate for treating areas specified by tripollar doesn't really seem to fit my experience.
It's hard to use the device on the back of thighs as you need to make sure you keep moving over the right area and keep an eye on the light to see when it changes. It means you have to be twisted awkwardly to look behind you, which aches and makes you work inefficiently so you end up either missing bits you can't really see or accidentally going over places twice. I end up taking about 40 minutes to do a PROPER job of my entire back of thighs (40min per thigh, and I'm size 10 so my thighs aren't enormous).
In reality this has meant that a few weeks in I have started working the pose only over key areas that need treating, only doing the worst bits to save time.
Something to consider if you want to use this over a large area, however if you're consistent it DOES work! I will continue using this device as I'm really pleased with the results, but i'll only be using it to spot-treat from here on as I don't have the time to commit to large area treatments