We went this year. Just got back home today (we went Thursday). I love gardening, plants, anything horticulture. It's been my dream to go and I'd originally booked to go 2020 which was cancelled so I was really looking forward to it.
To be honest, I doubt I'll be going next year...
Basically, it was just too too busy. Six deep around the edges of the show gardens so had to queue to see anything. So difficult to move even up and down the main avenue because of the crowds.
Food was pricey which I guess was to be expected (330ml standard bottle water was £3.50). Long queues for food but then no-where to sit down. Ended up eating lunch stood up which wasn't ideal. We had been there over 6 hours and I was knackered so we sat on a kerb to have a coffee.
It is also a bit smaller than I expected. The stalls were nice consisting of the usual brands that you'd find advertised in the back of aspirational gardening and lifestyle magazines.
I enjoyed speaking to some of the nurserymen and women in the pavilion, there was a lot of knowledge and passion there which really made it worth it. I also managed to buy some unusual varieties of miniature Hosta which I could take home on the plane.
Other RHS Flower shows seemed far better value for money. Whilst the show gardens were perhaps better at Chelsea, that is little use if you can barely see the gardens.
I would prefer that RHS either gave time slots for tickets so people were spread out a bit across the day, or increased the price of the ticket but allowed fewer entrants, or even reduce the number of tickets sold per day and then run it for a couple of extra days.