That depends on what you call big, but 3 or 4 hours is good enough time to go through most of it. All 4 floors
It has 4 floors and is not to big, however as someone already mentioned is a great place to spend few hours. There is also a restaurant. It's a very nice place to spend an afternoon.
It's much smaller than many history museums. If you're somebody who likes to spend a good amount of time looking at every exhibit, reading every placard, and watching every short film (they have a couple great ones) then you can easily spend a few hours there. But it's certainly not difficult to see everything in one visit. Fantastic place.
Yes. We were there 3 hours and it wasn't enough.
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