This museum is good, but not great. There are some interesting exhibits, but it certainly does not live up to expectations for a railroad museum. The plaster molds of individuals are rather creepy to behold, and the entire idea of the building being business office space takes much of the lure of a 'museum' away. You can still see interesting sets of china and historical railcars though, so it's not a complete waste of time. Prices are reasonable, so if you're bored, go for it.
Bottom Line: Not the greatest, but still a viable option if you're bored.