I own two Rumbas. A 6 that is still using the original rollers after two years. It worked so well we bought a 9. Disappointed with the 9. within 2 months the rollers were broken. I replaced them with after-market rollers because at the speed of the break I could not afford the OEM rollers every quarter. The after marker rollers are much noisier, but they have lasted a year so far. It is like tires on your car, which is more expensive, however, if you had to replace a tire or two on your car every quarter or even 6 months, would you keep buying that brand of tires or even keep that car? I think not. I have been hearing for a long time how sorry the company is that their rollers don't hold up, but I don't see or hear about anything being done to improve the quality or fix the problem.