My tip on the Envy is to ride it in the light wind setting at all times. At least that's how I like it. Regarding the max flow, think of it as a huge dump valve, and inflate your kite through the normal inflate if you don't have the special adapter. If you do have the adapter, you'll be ready to go 40% faster. If the valve were to fail, you still have the same inflate valve that every other kite has to use. I like the max flow quite a bit.
My other thought is that the 2012 envy is the best Looking kite I have ever seen. Seriously, it is gorgeous.

