Is it worth a 5-hour drive though?... For me personally it's a resounding no, simply because they aren't targeting my demographic very much (yet, although Cyclonator is a start). If I visit London and the south parks however, I will more than likely go the extra hour or so to Paulton's as well.
On its own, maybe it isn’t worth a 5 hour drive. But if you’re already in the South East it is worth the hour down the M3. Plus, although the rides may not be your demographic (which is most of us), there’s no getting away from the fact there are a fair few of them. For such a small park in terms of physical size, there are/will be 4 high quality themed areas, 6 rollercoasters and the park claim to have over 70 rides and attractions. I definitely rate Paultons higher than Chessington and I would say that’s a comparable park for target audience