Went there last August with our 4 children and we all thoroughly enjoyed our boys were 13, 12, 4 and 1. The oldest two went off on their own most of the time and as mentioned the only awkward thing was finding them and trying to get them to leave the site for a bit of sight seeing, they were enjoying themselves so much. The football pitch was a big draw and they spent many hours there. The swimming pools were excellent, if a bit cold, but that doesn't seem to bother kids.
We were lucky with our pitch as we were up by the cricket pitch and top 'pond', but saw several caravans and tents in awful locations in amongst huge trees, very dark and dingy. (I suppose it depends what you like but bare this in mind if you book - be specific as to what sort of pitch you're after).