I have been waiting for about two years for this to be released on blu-ray and the fact that a UK version that was region free came out which was actually cheaper than US based versions of the DVDs, was great.
I initially had some issues playing these discs on my blu-ray player, but it was the fault of my player, not the discs themselves. I had to set the "auto" feature for resolution off and select 1080 instead of letting the player choose (between 480, 720, 1080), which would result in the screen blanking out every few minutes. I've had this issue with my Sony blu-ray player on a few US based blu-ray discs that are new, but not with others...
The high resolution quality is otherwise spot on for these discs. I mostly look at skin texture to see if its really coming through well and saw no problem here. One thing for US purchasers to be aware of with these is that the UK/European menu system for discs is different from ours. They use a list of symbols for options such as "play all" or "choose episode" or "special features" with no text or caption explaining the meaning of the symbols. (I image everyone across the pond automatically knows what these symbols mean). So the little arrow that we interpret as a "play" button in the menu is their "play all" and the little TV screen icon is their version of choosing from a list of episodes. The asterisk symbol is their icon for special features... You get used to it after viewing a few discs but its not intuitive right off the bat.
Warehouse 13 was unique and fun to watch. Its sad to see it died after four and a half seasons, but it was fun while it lasted.