Instruct: Classify Amazon reviews into positive or negative sentiment
Query: 2nd one hieght adjustment broke!

This is our 2nd Bissell turbo upright.Both of them ended up having the hieght adjustment knob detent spring strip.You can't adjust the hieght on thevvaccum,its stuck at one hieght.I feel it wasn't due to heavy handed use,but a cheap,bad design.Its a nice vaccuum,but watch out with the hieght adjustment.