A little under a month of consistent use was all it took for the side brush module to become covered. Throughout the cleaning process, this is communicated through the use of a periodic squeak and a brief pause for the brush. When I called the customer service office in St. Petersburg, I received no information. They will not repair the product under the warranty, claiming that they do not have the necessary spare parts, but they are willing to repair the product for a fee (1700r). They recommend taking it to a service center in Hong Kong in order to receive free maintenance on it. What a disgraceful reflection on the quality and professionalism of this company's employees! In addition, I brought it back to the store from where I had originally purchased the vacuum cleaner so that it might be fixed. They informed me that the repair could take up to 45 days, but within 10 days they contacted and said they could pick it up. They promised that they would no longer fix it and instead either replace it or give back the money paid for it. While it is in effect. We will observe.