I have a vapolution but s/b about the same:

1. you should see a white, wispy vapor. But on green (initial) hits, I don't see vapor but I taste it and can feel it.

2. The taste begins to taste like burnt popcorn and the used bud (duff) has kind of a dark brown and crispy appearance. About a pencil eraser size bowlful is good for about 5 hits, for me.