[summarite]

Not OP, but my experience is that it's immensely fun but also immensely exhausting. Apart from sleep loss and new duties to fit into busy days there were also stressors, eg like many couples we moved houses when the second one was born. Timing was suboptimal as things got delayed and suddenly much too much had to happen at the same time.

Otherwise for me stressful was in particular to lose/reduce large parts of my social life (eg Toastmasters or going out to talks and discussions, theater, for beer with friends, ... Before children i was out 4-5 evenings a week, now maybe 2/month). Your life structure changes, which may or may not be easy for everyone to adapt to depending on the before & after. I have no regrets, but i do miss what used to be couple- or me-time and relaxing and simulating activities.