Cathead is a solid vodka. Filtered 6 times means less impurities for better taste. Also means less hangover. When filtering vodka there is diminishing returns in terms of filtration. I'm sure some "premium" vodka will come out touted as being filtered 10 times (which is stupid).

Honestly, Smirnoff triple distiller is my favorite for the price and is perfectly fine for bloodys and screwdrivers. I could understand if you wanted to go more premium for a martini but I don't drink those at home so I have no need. That said, if I do want to spend a few extra dollars I'll get Cathead solely b/c it's a ms company.