Hey guys, I have seen some builds connecting motherboard waterblocks with sli fittings.  In particular I am curious about bitspower crystal links.  Do these seal well?  Do they wear out quickly or no?  Does it matter if they are placed at angles, vertical or horizontal?  I have been googling about it and not much info.  One thread I read state that they crack and could ruin your build.
 
Thinking about hosing up with either these or koolance vid connectors as I don't want tons of tubing clutter.