National Museum of Scotland in Chamber Street is actually the main museum that made me realise just how good Horniman is (admittedly before the extension opened and I hobbled round with a twisted ankle from walking up Arthur's Seat the previous evening at sunset).
Chambers Street reminded me strongly of the Horniman, or at least how the Horniman would have been in the 1950s. In most respects the exhibits in the Horniman outclassed those in the 'National Museum' of Scotland.
Perhaps I should reassess Chambers Street after 13 years. At least it is a good excuse for a visit to Edinburgh.