We stayed here
The pods are great! We only stayed for one night (visiting family who were already there) and didn't fancy pitching the tent for just the one night. They were ideal
There was plenty enough room for our 2 double airbeds and a single, and enough room for our clothes etc. Everything else stayed in the car, which was fine because it was parked right next to the pod.
There is a little decked patio area just outside with a small covered area. Perfect for sitting out on/chatting/watching the children play etc, but not a great deal of space to cook on aswell. A family in the pod next to us had a table and bench set up with their cooking stuff and they seemed to manage perfectly well, so it can be done.
The pods were toasty warm at night, and we didn't use the heating at all. In fact, they were so warm I had to get up and open a window in the middle of the night! They'd definitely prolong the camping season
I'd definitely recommend the pods, but as a family of 5, I wouldn't want to spend longer than one, maybe two nights in it.