For CRT Gourmet's complete review on Mirador Ram Luna you should check out this thread from back in January
http://www.costaricaticas.com/phpbb2/viewtopic.php?t=1202&highlight=ram+luna. For something truly special try to go there on a Wednesday night for their Tierra Tico Buffet - an all you can eat and drink extravaganza of typical Costa Rican food, music, costumed dancers and fireworks for $28/pp tax included. That's only $56 for two people if you leave out the wine and stick to the beers, rum punches and horchatas. The part that really adds to the expense is the cab fare there and back as it is waaay up in the hills with an incredible view of the city lights of SJ down below. You might want to tip your driver to stick around for the return trip or ask your waiter to call you a cab 15-30 minutes before you want to leave.