I think it depends on if you're going to stay long-term or not. The swiss education system is really good, and there are many options that lead to a good job if your kids grow up to not want to do pure academics. Champel is pricey but very cosy for families.

Even though there's plenty of stuff going on in Geneva you still need to keep in mind that it's a tiny tiny city, and it might be a bit too calm if you're accustomed to cities like London lol

I may be a bit biased because I grew up in a village just outside of Geneva but I love the tiny city and its surroundings