Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Needs further engineering

This product needs more work. It has great power but if you turn it off and point the tip down, the stuff you sucked up will fall down through the tube onto the floor...especially heavy stuff like cat litter and guineau pig bedding. This could easily have been fixed with a flap over the tube. On the positive side, it has a great recharger interface...snug and simple. I hope version 2 will be better. Go for one of Black and Decker's other offerings until they make some improvements.