The people and infectious culture are what make Pardot extremely unique
Pros
Pardot is filled to the brim with intelligent people and an awesome culture. The best kind of culture. A culture that you might expect to find on the west coast, but unique in its own right. As an example, although you have to work hard, you will never be worked to death. People talk about an effective work/life balance. Pardot employs it in a way I've never seen before. I believe it allows them to achieve a level of productivity equivalent to one generated from an 80 hour work week. Also, there is always tons of food available, so watch your figure!
Cons
Although engineering uses tons of open source software and tools, I wish Pardot & Salesforce ingrained it in the culture even more. Releasing official projects as open source could be done and encouraged more often.