This has been discussed over and over ie Housing bubble about to explode in the Arc Lemanique Thinking about buying. Good/bad idea with a housing bubble?
Most recent: Buy or rent
My advice: rent unless your job is safe for the (15y) duration of your loan... with EU about to disintegrate... Ehem.
PS: a 15y loan is exactly that, a contract for 15 years. Beware of the hughe penalties you run into if you need to sell before.