Pros
The work is flexible, with the company focusing on results, not on metrics or on hitting strict deadlines. Working from home is allowed even without prior approval, and managers allow for flexible hours. Free soft drinks, coffee, and tea at the office. Office atmosphere is casual. No dress code, and there's Beer Friday where people meet at 5 PM to share beer provided by the company and to socialize. Developers submit their plans to management, but are trusted to determine what is important. PTO is paid off at the end of the year if not used. Beautiful view on the 20th floor of PPG Plaza. Monthly status meetings where the CEO explains where the company stands and what is planned next. Holiday party with bonus. Clear review structure.
Cons
More than 40 hrs is still expected, as is typical of a start-up company PTO has an upper limit of 20 days per year. There are 5 required shutdown days per year where employees must spend PTO. As with most start-ups, there is some uncertainty.