well it was good, and very tiring - it's huge!! depends what you want from a show whether it's worth it to you though. it is less crowded than Chelsea although there are probably as many people if not more. because it's more spaced out there is more walking, more potential to get lost, and no obvious route around to get a look at it all systematically (I expect that's deliberate).
There are plants for sale as well as tools/gizmos/equipment/furniture/'stuff' and seeds. I've come away with a rambling rose, a Monarda, an oak smoked garlic bulb, a £40 pair of secateurs 
and a subscription to GYO .agazine with a load of freebies. oh and a packet of purple carrot seeds.
the exhibit stands are very good, some utterly fabulous, but I would say it is not that thoughtfully 'curated'. in fact even the commercial stands aren't very well arranged. I actually went to the show intending to buy secateurs and there are four (at least) stands with small tools, which are all far away from each other. There are some avenues of stalls where you think 'ah, this is the outdoor dining patch, then' but then there will be random others in an entirely different zone.
At Chelsea you couldn't round a corner without coming upon meconopsis... here it's agapanthus. Honestly, I never need to see another!
Food pricey but plenty of space to picnic, and plenty of people were doing so.
take cash if you are in a mind to buy things - the wireless machines broke down during the day and so they must have lost some sales (I didn't get the Pimms I was craving!)
I would go again, definitely, but I would go online and research the exhibitors and try to plan a route and give myself a 'nothing but these' shopping list.