I've been doing 6-8hr rides on the weekends, and by the time Monday came, I was feeling it on my 45km round-trip commute to work. I invested in a pair of Assos Mille GTO C2 Summer at around $450 CAD taxes in, They worked well at alleviating the pain, so I decided to get a second pair. After reading reviews on Amazon, I decided to give the Chinese a shot and bought a $60 CAD pair. I could now blindly grab either one, and by hr 3 or 4, I wouldn't know which I was wearing. The initial feel is no doubt more comfortable on the Assos, but that quickly fades.