Grey I maybe wrong on the prices, but at the time it was 15 euro to get in. They don't have a tour guide so to speak, they have a short video expaining the abbey. then you get to freely walk through the abbey a gothic Church and the Mossalium(sp) plus the Garden which is huge. we spent around 4 hrs. they have a nice place to eat. and a large gift shop. Also I believe which ever way you take to get there some nice roadside pubs.
ms