A Russian Colleague living here in Switzerland told me about Swiss produced Xellent Vodka 6 weeks ago. She swore by it. So, the next day I went and bought a bottle, went to friends for dinner, put it in their freezer and 4 hours later, I took the bottle in my grip and promptly finished half of it over dinner (I was greedy and would not share). The next morning I had no hangover and promptly had a bit more. I swear by the stuff, it is very good. Pity it is not available as a small bottle for me to