Instruct: Classify Amazon reviews into positive or negative sentiment
Query: only works on tiled floors--and not too well

We purchased a LOT of these, in order to protect our many exterior doors. We tested them out on every door, and both myself and my husband were able to push through the doors with these on every door but the one with a tiled floor--and even that didn't seem like it would hold up to much more force. I had really high hopes for this product, so needless to say, I am extremely disappointed. I weigh 120 and I was able to push through this thing--it is pretty much worthless. The problem is that the button that holds the bar at different heights is too short and flimsy--when pushed against, the button goes in and the bar collapses. The foot is also not large even to provide enough surface area to evenly support the weight an intruder will place on it. I would use this in a hotel room as back up (although I'd feel just as safe with a chair), but I'm looking for something else for my home--unfortunately.