love the design, especially the soft blades -- however, if Zippi happens to fall onto hard surface, even from height of 6 inches, OR onto soft surface (padded carpet) from greater height, it WILL STOP WORKING!! gone thru 5 of these little guys & every time, it ends the same -- my little cat bumps against Zippi which drops onto floor -- i pick it up & NOTHING WORKS!! went so far as to take Zippi apart after it stopped working & could not discern any broken connections or other obvious mechanical issues -- plastic case was intact with NO cracks, scratches, etc. chatted with CSR who explained that Zippi would need extra cushioning to absorb such an impact -- but that is precluded by its design sounds like poor quality to me buy/use at your own risk -- and, for god's sake, don't BUMP IT!!!!