Looks like I may end up with at least one of these due to a shortage of Conti GP4000s tyres in my area (no shops have them - serious back order).

I thought the PR3 wasn't so good - flat spotted too quickly and a bit delicate on the puncture protection. I haven't missed a beat on the GP4000.

Does anyone have any serious miles on the PR4 Service Course or the PR4 Endurance and can offer an opinion?