Wikipedia's page about the MOTB is rather slanted against the museum, writing indignantly as if America's earliest white settlers were not overwhelmingly various types of Protestants (they resent the plain facts of history); but other reviewers have praised the MOTB, such as this article from The Federalist.
A Jewish scholar who has viewed collections in Israel and New York refutes many of the criticisms and says the MOTB's Jewish materials are an "invaluable contribution" to Jewish cultural literacy.
And -- there's no entry fee.
Doubt I’ll ever visit DC but that museum would interest me. I’d like to camp there for a few months or until the cloud moves me in these days of the earth dwellers bringing back paganism exponentially these days.