We have just returned from a much needed weekend without the kids, and have to say this place was fabulous, and our dogs loved it so much they spent most of the time sleeping! We only booked 2 nights - wish we'd booked longer now.
The property is spotlessly clean and offers all of the luxuries from home (wifi, sky tv, dvd player, hot tub) in a property that is easily big enough for the whole family (2 double rooms, 1 twin bed, plus a fold-up bed) Access is really easy, with ramped access to the front door should you need it. Onsite security was nice to see, but not "in your face".
Everything you need is at the property - a fully fitted kitchen, with some nice touches such as coffee machine etc, TV in master bedroom, huge fluffy bath towels etc. The owners have provided it all it would seem. Can't fault them at all - there's even a washing machine if you need one.
We didn't have time to go everywhere that we would have liked, and there are loads of leaflets to help, including books on the local area. Maybe that's one way to get you to go back!
If walking is your thing - we took the dogs, so that's a yes for us - there are dozens of places to walk them within a few minutes drive, but also around the lake that's right outside the property, and I liked that there are poo bins for you to use too dotted around the lake.
Foodwise - South Cerney (5 mins drive) has a few nice pubs, including dog friendly ones - Royal Oak did a nice lunch and have nice beers. There's a huge visitor's centre located over the road from the property that has a cafe inside, and there's a pub/restaurant there too.
Onsite at the park there's a good kids play area (including a fenced off small beach area on the edge of the lake), and also a small football pitch, tennis courts, table tennis etc etc. We didn't try any of these, but they all looked pretty good. Outside the park at some of the other lakes there was fishing, an air rifle range, water skiing, sailing etc so loads to do if that's your thing. It looked as though you can fish the lake at the property too, but don't quote me!
Sorry - seem to have warbled on - in summary, a great place and we'd love to return one day.
THINGS TO BE AWARE OF:
If arriving late at night (ie in darkness) look for the Four Pillars hotel on the left as you head from the A417; the entrance to the park is 200 mtrs after that on the right - we nearly missed it.
Buy wine before you get there, or at least make the effort to read the helpful guide that the owners have left which tells you that Tesco is about 5 minutes away. Failing that, drive 20 miles before accidentally stumbling on said Tesco store (LOL!)
Mobile phone reception (EE) is not great within the property, but seemed to work fine once you move outside; O2 worked a treat.