I was booked on it, but had an emergency, so couldn't do it. Unfortunately, was already on the WhatsApp group so had to see all the amazing photos. It's the guy who runs The Swimmer event I've been doing for years.
My mate got one of the initial batch of Ruckrafts, says it's brilliant.
Were you on the Above Below swim/run weekend thing? I was very tempted but I'm far too slow.