[Sisku Hanne]

In the west, vodka is more commonly used as a mixer rather than served straight. Vodka produced for the western market tends to be smoother and lighter in taste, with less bite & heat, and often more flavorless. Eastern style vodka, often served neat, tends to have more of a favor 'bouquet' and can pack quite a punch.
I use vodka in mixed drinks so I like the "western style". It was amazing the difference when I switched from cheap vodka like Smirnoff to good vodka. Just because there isn't much flavor doesn't mean there isn't a huge difference in the taste of your drink (and the quality of your life the next morning if you happen to overindulge)!

[kaiser80]

In that case, Siwucha is the most Eastern one ;)
It has an unique taste and "bouquet" but don't pack quite a punch. It should be served neat. Next day depends on how much have one drunk. After 0,5l you should be all right.