Instruct: Classify the given Amazon review into positive or negative sentiment.
Query: Have they CUT DOWN the quality of these?!

I've been using these 3M filters (size 20x25x1) for years, with the same 'Comfortmaker' furnace, changing them once a month due to severe allergies that my family has. The last 2 filters were totally collapsed, to where I could not slide them out! Makes me wonder for how long these had been sitting in my furnace collapsed/damaged like this! It seems to me that 3M has significantly cheapened the quality and reinforcement ability of these filters. Shame on them! I will be looking elsewhere.