Normally, anachronistic values don't interfere with my appreciation of a story. However, for some reason in this novel, the hypocrisy of the musketeers' behavior compared with their judgements of others (especially women) was trying. I certainly would not recommend it for children.
The plot is also very contrived.
Overall, for a "classic," I was underimpressed. That said, it is a relatively fun and easy read as long as you're prepared to suspend some of your values along with your disbelief.