Pros
Working at Draft2Digital you will likely get tons of independence. You don't have to jump through bureaucratic hoops or fight with IT. The product is very cool and really improves the lives of indie authors. The salary is good (though benefits are only ok). They do have some fun company activities occasionally.
Cons
The culture at Draft2Digital is toxic, at least for web developers. The CEO regularly and publicly in meetings, mocks Javascript and Javascript developers. The workload is demanding, bordering on unreasonable. Communication is minimal or totally absent. If you do work that management has a problem with, you will not be told about it, but it will be held against you. There is essentially no understanding of the iterative process of UI development, and if you do not regularly submit large commits to the repository, you will be accused of not working.