Not to stir it up, but my 16m RRD ZH wouldn't have relaunched.
That thing was a nightmare to relaunch. It was so bad (how bad was it?), once it hit the water, it was pretty much game over.
I loved riding that thing, but hated life when it hit the water.

Seems like most kites these days are easy peezy.

Easiest kite ever to relaunch (silly easy) - the new f-one bandit.