I have the MFT Multifunction Disc bought to balance exercises perform (balance), in addition to other body exercises that I do now so almost daily. I'm not very athletic but just for a short time became active around my body not completely degenerating. What I was looking for was a small device that I can quickly take advantage of in between (see brushing teeth, YouTube, ...). The Fit Disc is very high quality processed (board is made of wood, non-slip coating) and also shows when you practice something effect, unfortunately for me too little. With my 80kg and the middle of the 30s, the device appears to me simply too stiff, it's relatively easy for me to keep the balance and therefore does not constitute Herausvordeung. Clearly I do not feel a little effect, but as much as I had hoped. Children, elderly people or strongly beeiträchtigte be determined stuck with it, so I give no less than 3 stars. More I do not give to warn people a bit sportier. I have a TOGU Balance Board bought (Level 3 blue), which is significantly shakier and thus has greater training effect and was much cheaper.