I say, keep the press!  My french press is one of the most valuable items in the pack!  I used to use high-test coffee, but have found for some reason, when out in the bush, a lighter blend tastes wonderful...maybe it's the press?  Anyway, I use Yuban coffee...it does the job for me.  

Way, way, better than any instant.  

Having said all this, no, I never tried the stuff you linked to!

prouboy