Quite a fun trip! Although the description says there are two hours to spend in the gardens, it's closer to three. The bus ride (comfy, nice scenery and tour guide commentary) is just under an hour each way.
The gardens are beautiful! While I will always want more time in any location, three hours was a good amount to see everything, take plenty of pictures and even get a light lunch. I'd definitely recommend this tour.
London, United Kingdom