Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good comfort, fell apart in 4 months.

My wife got these for me for christmas, and at first I thought they were great, but the sole fell off of the right slipper after about 4 months. Quite disappointed that they didn't last at all. And it's not like I ran marathons in them or anything. My last pair (Acorn) lasted many years.