I've used the double lever kind and it worked well, but I've never used a floor corker, I don't do wine/mead enough to justify the expense of a floor corker, I just borrow my friends double lever one.
"People should not be afraid of their governments. Governments should be afraid of their people." - V
Secondary: Shady Lord RIS, Water to Barleywine, Pumpkin wine, burnt mead
Kegged: Crappy infected mild
Bottles: Apfelwein, 999 Barleywine, Oatmeal Stout, Robust Porter, Robust smoked porter, Simcoe Smash