They work great and you get 4 lights for the cost of some single lights we have bought! Last just as long as more costly rock lights we have bought. We use them at our mountain property to light up around camp and look great.  

Pros: 4 lights for the cost of one!
Cons: I resealed the edeges of the solar panel better just to make sure they do not leak water or snow in them... but I do this to all the lights we have bought.