i've been thinking about boots too actually. Been riding snowboards and wakeboards for a while so I'm used to bindings/boots but just haven't been able to commit on the kite side yet.
Any tips on technique?
lycra socks helps me getting in and also being kind of automatically ejected if the fall is too hard. stupid thing, i know. lol. true story
also find relaunch a bit of a pain as the ability to swim is compromise, the bright side of things is you won´t waste time body dragging and looking around for your board. the point being - for the first trials be sure to get a kite that´s not a pain to relaunch. or don´t drop the kite but then where will be all the fun?
& finally if the swell is ~chest high i prefer using the boots loose, think the risk of having 1 foot in / 1 foot out is highly compensated by the ability to dump the board relatively quickly (just turn your back to the incoming wave, extend your legs and let it take your board off). but using boots in waves is not such a good idea anyway
think you will love it. i know i do