We stayed in October half term. Booking was easy with great prompt communication from the owner, which continued post booking in terms of answering questions and providing information.
The caravan itself I felt was good value. It's a caravan, so expect a caravan. It was an older van which I would say had been refurbished inside. We found it comfy, clean, warm, had bedding and towels provided - perfect.
We were met by Sue who lived locally, given her phone number and able to contact with any problems. She was very welcoming and helpful.
The site itself is well situated for Hayling and close to everything you are likely to need.
Would definitely pick the caravan again if staying at Hayling.