Technically rewarding, but there are costs
Pros
1. Very flexible company for employees. Very few formalities like mandatory weekly meetings, etc. Communication is done on a much more ad hoc (and efficient) way. 2. Products you'll work on are almost all cutting-edge and challenging. The people here seem to all have the common mentality of making advanced, industry-leading tech. This makes it both inspirational and challenging. 3. Little to no BS to get in the way of work and there is a lot of focus on improving productivity and efficiency.
Cons
1. Compensation is not where it should be. The base salaries seem high but the yearly rewards are nowhere near as good as other companies. Expect what you get when you accept the offer to be what you'll get at the company. 2. Work can get demanding but there aren't many benefits to make the workplace more comfortable. Obvious things like an on-site gym, shuttle services or even public transit subsidies would help greatly.