Received these yesterday and couldn't wait to open them.  I just swept off my ugly concrete patio and started snapping these tiles together.  They went together easily with no issues and QUICKLY!  I had the whole patin done in 35 minutes.  Ok, so it's a small patio but still…
They look amazing and my patio furniture looks great sitting on them.  My neighbors love them too!

Pros: easy assembly, look amazing, good quality
Cons: slightly expensive, don't know how they will withstand the elements yet...