Both are right at the same time, not mutually exclusive!
The job is totally FASCINATING, from every point of view: fast-paced, meeting incredibly smart and driven people, taking a lot of responsability from very junior positions, driving change and impact very fast, etc.
However, the issue is all that comes with it in terms of lifestyle, traveling... Is not sustainable for most people in the long run -and also for partners and families, who are also forced to take this lifestyle even without having chosen it!-.
This is why normally people last between 2 and 3 years only, on top of the fact that the exit options are very atractive.
Hope it helps!