I am actually sending my es-2s in today for repair.
They molding on the left ear piece cracked from normal use, and I had to have it fixed within the first few months.
They then developed a channel imbalance, which I also had fixed.
I am sending them in again for the same problem, and since I am out of warranty, the process will probably cost me about the price of new midrange shure in-ear product.
So yah,
whine whine whine, b*tch, b*tch.