In reply to fire_munki:
I have the lined, and unlined, versions.
I wear them almost everyday, and have not had any real problems with durability. However, they do tend to wear quickly around the heel, and this did possibly cause them to be uncomfortable in this area initially.
Climbing-wise, I have never done anything more serious than easy bouldering, although I did use them indoors on a few occasions to test them out. I did not find the rubber particularly sticky, and had far better results with the Mammut Obelisk, which is perhaps more climbing, and less approach orientated.
I purchased both versions almost new on ebay, at around half the usual price. Would I buy them at full price? Probably not.