This is my 4th shark, recieved as gift. We get a new shark every 1.5 years it seems. They just seem to lose power on us. At first they work awesome, but something happens to them. I always buy extra filters and switch them out frequently, keep the brush free and the bin clean. We got a husky last year so decided on this model. At first we vacuumed in 30 seconds, now it take forever and many passes to get the floor decent. This is not a cheap vacuum. None of them were. I have to figure out if this makes financial sense to keep buying a vacuum that only lasts a year.