We used it in a style where 2-3 people teams shared code to develop a feature, a person often worked on different teams at the same time. When a group finished

We used it in a style where 2-3 people teams shared code to develop a feature, a person often worked on different teams at the same time. When a group finished they forwarded they changes to the 'merge master', a weekly shift of lead developers of the company. After a code review the code reached our main repository or landed back for a review. Sometimes weeks of development arrived to the main tree in a safe way with full revision history. This kind of development method was unheard before, the style change improved code quality and reduced conflicts. My favorite story when we worked with a college thousands of kilometers away till the last minute to demonstrate a key feature to a customer at a trade show, exchanging revisions by emails, delivered on a USB stick. That's a real technology start-up way to handle development. I wrote and debug a lot of code to that company but my biggest impact was to introduce mercurial to the team.