re: Company stock @15% market discount

How confident are you in your company to grow and create more value in the next couple years? If shares remain flat over two years, you make 15%. (12%-13% adjusted for inflation)

1) Case 1: Buy shares at $85 on 1/1/13 (15% discount from market price of $100/share). Tough couple years, and on 1/1/15, shares are trading around $90/share. You've made about 6% over two years which is ok, but maybe you could have made more somewhere else.
2) Case 2: Company's shares remain flat at $100, could you have put your money somewhere else for two years and made more than 15%? (probably not)
3) Case 3: Company's shares increase 15% over two years and you sell at $115 and you've made about 35%. You killed it, and there's unlimited upside (maybe the company's equity appreciate more than 15%)

Also, does the company pay a dividend? If so, just makes it a sweeter deal.