Pros
Blacksheep on the outside looks like a very cool, innovative and fun company to work for, it looks good on your CV; Good & interesting projects, if you are lucky to get on one; I worked with some of the most creative, talented & inspiring people, the team of Blacksheep (excl. management) are the brains & absolute bones of the projects.
Cons
High turn over rate; Poor pay, no proper reviews, no salary negotiations; Bad management, nobody willing to accept responsibility for their actions, and there is no one you can rely on if you have an issue - no HR department. No recognition and appreciation given. Limited experience to see a project from start to finish due to many projects not making it past concept or on site for 3 -5 years.