Come on! Winters are harsh, particularly the last one...
The other thing you want to investigate before making the move is taxes! Income Taxes are high, the marginal rate is 45 pct.
As for taxes: if you're just coming for 3 months, no tax worries. Beyond that: 1) you get a lot more services for the tax money, like health insurance, university; 2) the treatment of capital gains taxes is very favorable for entrepreneurs: http://venturevillage.eu/gmbh-tax-change