Meth is filth and highly addictive - have a read of this book - it's entertaining as well as a good intro as how quickly meth can take over a life:
I tried Meth once - I was awake for three days & thought I was going to die at one point - the fatigue crash at the end was pure evil. The downer - misery. I never tried it again for obvious reasons.
But as you'll read in the book - for some people it all starts off so well, so easy, so nice...by the time they realise they aren't - they are fooked.
Shabu-shabu, crank, bing, ice, whatever you want to call meth is not for a pilot or anybody else - better than kratek cigarettes - nor most of the drugs I've ever tried.