I was very happy with my first experience using the Time Shifter App. Basically it gave me a sleep/nap/wake-up routine starting from 2 days before the flight all the way to 2 days after landing.

I took two long haul flights and traveled across 12 timezones. Upon arrival I'd say my jetlag was insignificant. For the trip back home I experienced mild jetlag, though I have to admit I could not follow all the preflight recs due to work commitments.

I'll be doing a similar trip in the new year, this time with my wife and infant son, and we'll most definitely use the app again. I can highly recommend it.