Hiller is a well known name in Germany as it's the oldest vegetarian restaurant countrywide. So we decided to pay a visit when having a stopover in Hannover.
Unfortunately there was minimum staff, only one person serving the whole restaurant. But: the restaurant was only filled to about 1/8 which made us wonder why (it was friday evening), so it should've been no problem to serve everone orderly and in time. Alas, it just didn't work out.
The waitress was extremely slow, even for the menu we had to wait about 15 min. (until then we already had taken the menu from our table-neighbours). The best thing was: people that were there before us received their drinks and food after us. The waitress also mixed up some orders and was clearly swamped.
When we finally received our food the portions were big. The flavoring was okay, but nothing special. I had some kind of Schnitzel (seitan) with 2 small german dumplings which were quite firm and not fluffy at all, as one would expect. The plate was overloaded with mushrooms and the big Schnitzel, so that the meal wasn't well balanced (too much protein stuff vs. only a few carbs). I also had a mixed salad which had a nice dressing.
My GF ordered some noodles au gratin with spinach and soy pattie. It also tasted okay, but the noodles were bathing in a watery "sauce" which seemed to be the spinach that had lost its water. Thats a mistake an amateuer would do, but not something one would expect from a restaurant. The "gratin" seemed just to be some kind of tomato sauce on the top.
All in all we weren't impressed much and the service was friendly, but slow and confused. We don't know how it was some months or years before, but right now the Hiller doesn't seem to be something one definately oughta pay a visit.
Cons: Slow & confused service, Mediocre food