When learning the choice of foil is pretty important if progress is going to be made rapidly. The choice of a large A or delta shape wing is ideal as it is relatively stable and can be ridden at slow speeds.
After riding a delta wing (Carafino) for 7 years I upgraded last year to a high aspect wing shaped foil http://jc-kiteboards.fr/news/category/matos/kite-foil
and had to practically re-learn the sport. This new SPOTZ foil needs to be ridden a little faster to get going and is much less stable especially when doing turns. I can't imagine anyone having fun learining with this wing shape.
The main advantages are higher pointing (which was pretty good on the Carafino), superior glide, and huge top end speed. The Carafino could never exceed 15 knots on GPS whereas the SPOTZ can exceed 25 knots and top speed really depends on how brave you are.
I am not into racing so I am now selling this foil (anyone interested?) and will eventually purchase something more user friendly I can use in waves.
WINDMAKER, please contact me regarding this foil.