Has anyone tried out those stretchy jeans?

I've heard Joe Rogan rave about them, and was wondering if anyone else has tried them out? I think these are the ones he buys:

http://barbellapparel.com/collections/men?gclid=CjwKEAiA8K20BRDetNv3p6DNhXwSJADSwa3t9kZVZJbvCIljrIoHjttni0IUm9f3qTs0xdVD3hsZCxoCp_fw_wcB

Are they that comfortable, and worth the cost?