Instruct: Classify Amazon reviews into positive or negative sentiment
Query: empty it regularly: it won't turn on if it gets too full

Several other reviewers have complained that their machine suddenly stopped working. That happened to me recently and I checked the canister, found it was full (I couldn't believe how quickly it filled up, but I have two cats and this thing picks up a lot of fur) but once I dumped it out it worked again just fine. Perhaps it's a safety feature to not turn on if the canister is full, so before you haul yours to a repair shop or worse, throw it away, try emptying it out. I've had mine for a couple of years and it still works pretty well. I used to have a Dyson when I lived in Japan and loved it, but the motor burned out after I brought it here because it wasn't designed for U.S. power (higher than Japan). I'd buy one again if it weren't for the price. This is a decent substitute. I love not having to change bags.