I am here for a long holiday with a foodie friend, and this place really takes the cake when it comes to food. The prices are amazing and the system here is genius. Don't expect to have a huge lunch that inhibits movement afterward, but instead expect delicious, freshly prepared small meals (of which you can choose two to three of them) as well as a huge array of daily specials.
I would honestly recommend this place for a light lunch, and a must visit while in Amsterdam. It's also in a lovely corner of Amsterdam so make sure to make it a part of your itinerary :)