airsail said..
Foil kites have developed for the race market, high aspect, twitchy things to use to get the best performance. Although I haven't used one iit looks like Ozone has taken a step back away from the race orientated foil to a fun easy to use foil by developing the Hyperlink. I just wish the price was a bit more reasonable.
I'm using older foil designs, Speed 2, Psycho 3 and they work on the hydrofoil just fine. Really easy to use as they are low aspect compared to the current race foils, but geez they are slow. This is something you just have to get used to but the 12 gets me going and relaunching in 8 knots.
It also depends on what style of hydrofoiling you want to do. Foil kites are more of a park and ride type of foiling, going places, the occasional transition. LIE's suit the multi transition runs like Bigtone has posted above, foil kites just aren't quick enough to make this enjoyable. Maybe the Hyperlink is quicker (12 mtr) but the vids I have seen don't really show turning speed.
I've been using the Hyperlink 12 and 9M and a Chrono 3UL 11M up here lately in our typical autumn light easterlies. Not foiling just with 5'1" Evo and an Axis Patrol 1.47 x 48, and an MBS comp 95 landboard at low tide (also a kite buggy, that a local has purchased).
The Chrono 3 11M has the best lowend from all 3 kites, and I have a 13M coming as my light wind kite which I think will replace my Zephyr 17M.
The Hyperlinks turns much tighter than the Chrono 3's, but the Chrono 3 maintains is power right through the turn, you just need to be high enough before you do a downloop to transition.
Hyperlink is more lively for sure, does not turn as well as my Reo V4 12M, or Enduro V2 11M, but there is a definite "foil" technique, thats more about reading ahead a bit and initiating turns a bit earlier than you would with a tube kite. I went out in some pretty solid 2+ times overhead surf with the Chrono 11M and felt very confident with it, it is super stable and does not want to overfly and do a fontal collapse. Same with the Hyperlinks. The only time I saw any issue with the Hyperlink was when teaching a younger inexperienced kiter they sheeted out too quickly as the kite was launching and it did a front collapse but recovered and we just continued on as if nothing happened,
Just a curious fact, and to counter some of the hype out there about low weight kites we weighed a 9M Reo V4 recently its was 2.6kg, and a 9M standard Hyperlink is only 1.85kg, so you can see where the light wind stability and extra performance comes from. When I get my 13 UL Chrono V3 I'll weigh it too.
I think in super low wind kiting, which only UL foil kites can do, you really need to be on top of your game, because they will fly in very low wind once you are moving, so it is easy due to apparent wind to get well in an area of reduced wind (a lull) and then when you go to turn and slow down there is barely enough wind to keep even a foil kite flying, due to the combination of an extremely efficient hydrofoil and a foil kite.
The older Flysurfers were definitely slow and were quite a bit heavier than modern foils too, FS used to seal all the seams, whereas now I know Ozone and other foils i've seen do not seal their seams and rely on the skill of the rider to be able to quickly relaunch using the reverse method.
), and had no problems staying upwind - but had to work the kite hard at times. I'm 79kgs. If I had dropped my kite, relaunch would have been a problem. My mate went out on his 14m Apollo and Cab Double Agent. He came in after maybe 15 min as his kite turned into a death machine once up foiling and creating apparent wind. Comfortable power is a fine line on lighter days with bigger kites.
14.5 North Ace vs 13.4 Cloud or even the 11.5 Ace on 24m lines. 
