oh, you'll love it!
Just prepare for all weathers - it's lovely to go for a walk even in the rain, there's loads of wildlife, no cars!, and if you've all got waterproofs you can still do slides and stuff, then come back to villa and get warm and dry. Somehow, nowhere seems to be miles from anywhere, even though sites are clearly very big. (We've been to Sherwood Forest and Whinfell)
Villas are generally comfortable rather than luxurious. We go every year with my family (ie 14 of us) for long weekend and have a great time - roll on second weekend in November!
Top tip - do the spa on Fri night, don't worry about going to ladies only, very few men do it anyway and it's so much nicer when it's not so busy.
Beware that the swimming pool thing (sub-tropical experience, hmmmmm!) is very noisy, not at all what I'd imagined, but you'll be surprised at how long you can spend there, hours just flash by.
Also, shops/restaurants not the cheapest in the world. I take lots of food that we 'don't have to eat' - baked potato, tuna sweetcorn type of thing, which we can cook if we can be bothered, but can buy out if feeling lazy and flush!
Oh and the knives are generally rubbish! (sorry, will stop now)