Good choice for the Mach1. I decided myself for this kite about 6 weeks ago, and so far I am totally d*e*l*i*g*h*t*e*d .....
Considering my weight (73kg), board (174TT), and winds in the region (typical range 5-30) I was hesitant between getting a 9+15 pair, or a 12+18 pair. I decided on the latter, 12+18, and that choice has been good to me this far!
Personal wind range for the 18: min 6, max 21 (yep! last sunday: avg wind in the 16 mph, gusts reported on iwindsurf.com at 21!!)
The 12 I have used less until now. Experienced min: 10. Max: probably 20-22 on that day, but have not had a chance to try in stronger winds yet. I would imagine the max at around 28-30 mph for me.
 have experience max at 30mph this weekend........
Pro/Cons : check posts in this forum one/two months ago. In sum: clearly one of the winner this season, major pros are large wind ranges, excellent responsiveness (even when choked!), and speed. Only cons I have identified this far is poor (fair?) relauchability of the 18 in low winds (like most "big" kites, I was told).
Good luck in making a choice that will best fit you.
Fly high, fly safe, and enjoy!
<font size=-1>[ This Message was edited by: Jido on 2002-04-24 03:11 ]</font>