Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Disappointed

I ordered these to replace a pair of Ugg slippers I liked so much I wore them out. When the new slippers came I was disappointed, because the quality did not seem to be up to Ugg standards. The lining felt stiff and uneven, and there were tufts coming out. I returned those, but when the second pair came they weren't much better. I decided to keep them anyway, thinking maybe the lining would break in and they'd feel as comfortable as my old Uggs. Well, they never have. Within a few months the lining started to wear thin, and if I wear them very long the black dye starts turning my toes black. I used to think Uggs were high quality and worth the expense, but not any more.