I've made the "Vieux Chateau du Roi" Winexpert kit, which is a Chateauneuf-du-Pape a.o.c. It contains Grenache, most likely more than 50% of the juice is Grenache juice.
It does make a good wine, but don't except it to have character like a Cabernet or even a Shiraz (in the Vieux Chateau it is mixed with Syrah/Shiraz and Mourvedre). But, it will make an extremely quaffable red wine, that is easy to drink and pair with food. If you want to give yourself an idea what to drink it with, look up the Chateauneauf-du-Pape page on wikipedia. It really is an ideal table wine, and if you make beer (sorry if you don't) I would compare this to a wheat beer: light taste, easy to drink and easy to pair with food and ready to drink early, while you let that amarone age.
MOD EDIT: Sig only takes up 6 lines now. Fermenting: Apple cider x 2, Doppelbock, Red, Oatmeal Stout, West Coast IPA x 2
Bottle conditioning: RIS
Keg conditioning: La Fin du Monde clone
On tap: Maudite clone, Double Munchen, Oktoberfeast, Oktoberfest Pilsner
Planning: Brewed in 2011: 22 (2010: 15, 2009: 29, 2008: 21, 2007: 1)
Wine made in 2010: 6 kits (2009: 19, 2008: 30)