in my opinion, the Schönes Wochenende passes are great, as long as you have time you get to see a lot more of the countryside and get a bit more personal with some smaller towns than when you fly through at 200kph on a ICE. I've done a day trip from Hamburg to Berlin on a Schönes Wochenende pass and it was definitely worth it, even though we only got about 8 hours in Berlin out of the deal.