What's the latest and greatest for treating leather hiking boots?

Hello all,

I thought I'd float this question on what everyone seems to be using.  I
pretty much finished my tube of Zamberlan Hydro Bloc Proofing
<http://flic.kr/p/edHCES>   on my newest pair of Zamberlans, of all
shoes.  Any ways is there a de facto standard that everyone seems to
going with?  BTW, I thought my last tube of proofing worked pretty good.
Kinda surprised that it's not widely available in the US or A.

Thank you for reading this and your comments.