Pros
Working with bleeding edge technologies. Spot Runner is working with the latest and greatest from Microsoft. There are a lot of extremely talented individuals across the engineering group and there is a great sense of teamwork and togetherness.
Cons
The biggest problem is Spot Runner does not value its employees. They have gone out of their way to recruit some of the most talented people in the business, then they proceed to treat them horribly. They expect their engineers to work ridiculous hours and do not reward them for it. Employees are given stock options as a part of their compensation package and this stake in the company is supposed to be compensation for the ungodly hours. It just doesn't balance out (and SR remains a private company). I am not just making a blanket complaint about overtime. Any good engineer will put in the time needed to finish the job. But spending endless hours on products that are going nowhere isn't exactly rewarding.