I'll second this opinion. Experience under pressure will lead to a stronger you(smarter, faster, better at making decisions, weighing the odds...). However, ma

I'll second this opinion. Experience under pressure will lead to a stronger you(smarter, faster, better at making decisions, weighing the odds...). However, make sure that the start up does have a chance of succeeding. If not, then make sure that you actually have the authority to change directions to make it so. All in all, if the opportunity doesn't have a short term gain(via salary), then make sure that it has a long term gain. And weigh things subjectively.(yes, that's not a typo. follow your heart) Of course, this is all just an opinion of some dude on the internet. So take it for what it's worth.