Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Bagless-convenience but inconvenient because of the dust cup filter

Pros: Inexpensive & you don't have to buy bagsCons: You do have to replace the dust cup filter, which is more inconvenient then replacing a vacuum cleaning bag. The dirt tends to stick to the filter so cleaning out the canister and removing the dirt from the filter is time-consuming and creates so much dust around that you would need a dust mask.In short, I wouldn't buy a bagless vacuum cleaner again.