Been there recently... the experience was so so.
There are 3 crucial elements in falafel: the falafel balls, the tahini sauce and the pita. The salad bar is of secondary importance.
The falafel balls were OK, but nothing to write home about.
The tahini sauce, which is a crucial ingredient to falafel, was plain awful. Since raw tahini is very expensive, many restuarants use various substitutes. Some places mix with flour. The sauce in Amsterdam didn't taste like real tahini. And it was sweet instead of sour. Only god knows what they use.
The pita was yet another disappointment. It was thin and hard and small, so it broke quickly. Good pitas for falafel are large and thick and soft.
The salad bar looked nice but the stuff we tried didn't shine.
Conclusion: If you must have falafel, go.
If you want a good one, keep looking.