Got an offer at a start up. Basically would be a position I would get after working 3-4 years at my current company. The pay is the same, hours more but the upside is greater as I get significant equity into the company. However if after 1.5 years if we don't achieve set goals, the company will close. I 'm about 50/50 right now. Anybody else left for a startup, whats your experience?