Don't let the decor fool you - the food is quite modern at the Fischer Hütte and really, really…read moregood.
When entering I wasn't really looking forward to my meal as I was expecting yet another rustic, old school fish restaurant that keeps it simple, like so many in this region at the sea - but the food pleasantly surprised be. It's not overly pretentious, but they really try to offer you something a bit different. And when that is combined with quality fish and people who know what they are doing, then you have a winning formula.
Service is a bit more old-school like the decor of the place, meaning not especially welcoming - but it wasn't a deal breaker. If the food puts a big smile on MY face - the waitresses doesn't nessecarly have to smile all the time :)
Practical info: on weekends (and I recon every day during the main holiday season) you should make reservations. The food being good isn't a secret ...