Instruct: Classify the given Amazon review as either positive or negative.
Query: I took 4 stars away when it collapsed on me.........

I was on this thing with nail gun in hand and one of the casters broke and it sent me to the ground.......do you see a theme here? Read previous review. I did not exceed the weight rating.....the wheels were not locked......and the floor I was rolling it on was clean, it just snapped at the stem while I was trying to move it. I contacted Buffalo for a replacement but Buffalo said since could I not find the receipt that's not going to happen. They offered me "replacement" casters for $55, no other comment like "Sorry to hear that happened" or "I hope you weren't hurt", they just want more of my money for an inferior product. I think there is a design flaw and they don't want to admit it. Maybe they redesigned the casters but if not stay off of these!