It sounds like our experiences at Microsoft could hardly have been more different. Virtually everything I learned at Microsoft could be filed under "whatever you do, no matter how desperate you are, never do it this way". The systems were unreliable, inefficient when they worked, and the number of person-hours routinely wasted on tool management was staggering. The culture was unhealthy, competitive and individualistic, sometimes to the point of hostility. You saw cross-team communication, I saw at least a quarter of every working day wasted in routine status meetings, in which two or three of the ten or twelve people present spent an hour making a couple of decisions while the rest of us tried not to look too bored...

Of course Microsoft is a big place and different divisions work differently. I'll never take the risk of landing in such a mess again, though.