We've been loads as a family and love it.
Why?
Frankly because the kids do and surprisingly enough still love it as teens.
When they were little it was a great place to go that's geared around families (no-one batting an eyelid about BF a baby, having lots of activities for small children etc).
As they grew older it's more centred around activities - quad biking/archery/climbing etc
The accommodation is lovely (even the basic villas, though I confess we tend to book the deluxe ones with a hot tub/sauna outside and even the treehouse on the odd occasion).
Our nearest CP is only a few hours away and as soon as you get there you're on holiday.
The parc Market is well stocked (though I tend to take quite a bit with us as it's not cheap and there are some speciality ingredients I like to use).
As there are no cars the kids were able to "free range" at quite young age, now older they book their own activities (to a budget).
I love the chance to visit the spa/treatment rooms and have some "me" time. DH likes quite a few activities/sport eg tennis with DS and going for a run through the woods.
No, it's not cheap and it's not for everyone (well the basic villas if you fully occupy them aren't bad value but the extras really do add up) but if it suits your family then it's great.
I don't understand why people knock it. If you don't like it, don't go....