Hi Sean, we got our 2008 model Vogue 600 in November and I have to say we're delighted with it. The space it provides is brilliant although there are only two of us.
The bunks are plenty roomy enough for an 8 year old, to date our bunks have slept two 30 plus year olds although the width was an issue slightly on the fixed bunks for a full blown adult. Just be aware that the safe load limit is 11 stones for the upper bunks certainly, although I have slept on one of the lower bunks weighing in at a tad under 16 stones with no problems.
As for the rest of the van, it is great and the onboard water tank has come into its own over the winter.
Cheers
Nick.