Social charges really crush the ability for French companies to compete. Then with CDIs making it almost impossible to fire anyone, it results in a far less liquid job market. Now there's even talk of actually forcing men to take paternity leave in the name of reducing inequality between men and women in the workplace. I live in France and love it for the most part, but other than my tiny hotel business on the side, I would never consider starting a company here. Even filing the paperwork to form an SAS is arduous. I can incorporate in the US in less than a day and have a bank account opened the next day. In France, even something as simple as getting business-class internet requires a SIRET number for no logical reason. I could offer to pay €1000 per month and without some piece of paper saying you're a business, you can't even get a business phone line.
However one really important area that ought not be missed is the amazing pre-k (free or nearly free) childcare. If I were in the US, that would amount to $20k+ per year (I have 3 kids.) That is definitely a plus.
In France, you have less disposable income than you would in the US (even after benefits are counted,) however, France does have a great lifestyle if you can afford it. Though I can't say much for Paris -- expensive, somewhat dirty, a dreadful public transport system (try taking kids with strollers on the metro,) along with a very high cost of living and you have a pretty bad place to raise a family. Toulouse, Grenoble, Lyon, Avignon on the other hand -- really great places!