I just bought a bottle of this (for a much lower price -- this internet site is such a rip-off!), so I think I'll have to do a side-by-side against Doc's Flor de Cana and NDD's Habana Club. Results will be posted soon.
Zacapa Centenario 23-year
http://www.internetwines.com/ronzaccen.html
Flor de Cana 12-year
http://www.internetwines.com/rws20591.html
Habana Club (not sure which one I have, I think 7-year)
http://www.havanaclubfoundation.com/...gos.asp?show=1