Go to this post...I had the same questions about staying at Portofino or Mata Chica for our honeymoon. I haven't been yet, but I think we are going to stay at the Mata Chica...but everyone says good things about both, so it will probably just boil down to you just deciding for yourself. This was my previous post:
//ambergriscaye.com/message/ultimatebb.php?ubb=get_topic;f=4;t=007683
Good luck!!! And Congratulations!