Went here tonight looking for an affordable place to eat (which I've come to accept doesn't exist…read morein Switzerland). The 16 franc pizza we ordered was supposed to come with mushrooms and arugula. We left off the mushrooms and added prosciutto, and they charged us 20 francs, which seemed to be a pretty big price difference. There were other pizzas with prosciutto + another ingredient that were 18 francs, so I don't know...maybe arugula is a hot commodity. It sort of just seemed like she was tacking on charges for every ingredient, even though the arugula was already supposed to come included in the cost. ANYWAY, the food was fine, but we had just come from Italy, where you can get the same thing for 8 Euros. There aren't too many options on the menu, but what they do, they do well.
My biggest qualm is that it isn't really worthy of a single $ here on Yelp. Like most other places in Switzerland, I would put it at 2 $$, and there are other options in Luzern with similar prices that might be more desirable.