I brought my boys to see this place. I heard it was must see. It was very interesting. It is very clear the passion the owner has for his hobby. Some of the added scenes that call out past tragedy (a kid destroyed track, so there is a passive aggressive note left that this was how it was left) and the numerous outhouses, etc. really display the eccentricity of the collection.
All in all it is a remarkable display that clearly took years of highly detailed, hard work.
Don't get pushed into buying the outdoor train ride. It's better to take your time to enjoy the display than ride it.
Be prepared to spend a few hours here, it's better to plan to look at everything than rush through displays.
Also, for families with little ones, DO NOT take wide strollers. The ramps and certain areas can be very tight.