Chicago bus tour

Would all of you like to recommend me something about the chicago bus tours? Because It is my next trip which I am going to enjoy with my friends. We are making a plan to take this tur for 4 days. So you give me a nice recommendation regarding this. I am sure your recommendation prove useful for us.

There are lots of things to do in Chicago that you should keep in mind and to have fun. like
jaw-dropping architecture,
vibrant music scene,
excellent food, — including deep-dish pizza —
and iconic surroundings

Go ahead and try all of them.