Can't tell you how often the show goes on -- I know that during our dinner, something was going on most of the time, then they took a break.
I absolutely loved the food, but then again, I love German food. The sauerbraten was very good, but it may not be for everybody. (It's like a soft pot roast with a ginger snap-vinegar (or "sour") gravy).
Other things a little more "American" are the roasted chicken and the roast pork, which I thought was the best. I had several portions of just that!
"Schnitzel" is a fried cutlet -- either veal, chicken or pork. I forget which they serve, but it also was very good.
Then there are different kinds of "wursts" which are sausages.
Unless your family is very picky, I cannot imagine that they couldn't find something they'd like. The desserts are also very good.
One negative for some is that you might be seated with "strangers." The tables are long and buffet style -- so a party of four maybe seated next to a party of six.
The bottom line is I would eat there every time. My wife and kids always vote for something else -- not so much because they didn't care for it, but because there's so much else to try!
Have fun whatever you choose!