Head/Penn Racquet Sports
I purchased Head racquetball shoes in November and started wearing them a few months ago. Note I only wear them to play racquetball a couple of times a week.
In a short time they developed cracks, discoloration and the lining in the back developed holes allowing for the hard plastic support to cut into the back of my foot.
The response I received from customer service when reporting this problem, was that since they were bought in November, they are no longer covered under the warranty and would not do anything.
I find this unacceptable and will certainly keep this in mind when considering future purchases.