I purchased this tent to take my wife and 2 year old son camping. The first tent I was given had faults, so did the replacement. Cotswold's exchanged them both with little hassle.
The 3rd one was tested at the last opportunity and was A OK.
I would say this is a 4 man tent, max. Pulling back the sleeping pod divide really doesn't add that much space, it would just be really snug.
There's good ventilation with the vents above the front door, side window, rear vent and additional door.
The tent looks like it has plenty of room when you put it up, but once you've got all your gear, food and luggage in there really isn't much space left for living.
Definitely get the fitted tent carpet, it's good if you and your kids are stuck inside because of bad weather.
I'd recommend this tent and have done to a colleague, but if you're serious about space then go for the Icarus 500 XL. I'm looking into a forward extension for some extra space, in hindsight I'd have paid the extra as it's a cheaper option to the extension and less hassle.
Don't forget to check dimensions and weight when picking your tent...