I have been there (go sox!) a few times, and it is so worth $14 per person- (and yes, just get your tickets right from MLB.com or even just go there the day of the game and buy them- unless it a Sox or Yankees game, you'll be fine the day of)- it's a beautiful ball park (it's not fenway, but no place is!) and you will not regret going.
and like another poster said- we have to drop the "devil" part when we speak of the rays.
also- they have a neat Ray tank- it has the sting rays and you can go see them (free) and feed them (probably a charge for ray food) and what you do is you get a (free) ticket for a time frame to see the tank (so it's never over crowded) and just go during your time frame. cheaper than seaworld!! the dome style does seem weird (esp if you are used a park like fenway) but I predict you will not be disappointed.