4 strokes are not difficult to break in or set up. Follow the manufacturer's recommendations regarding rich needle settings and run about 3 tanks through it on the ground never exceeding about 4000 rpm. (You need to use a tach for this and I would highly recommend that you buy one as it is harder to tune a 4 stroker by ear.) You can start flying on the fourth tank with the needle leaned out a little and use up to full throttle. On my Saitos, the low end needed adjusting after about 10 flights. Using the pinch method (same as for 2 strokes), lean the low end mixture out and reset the needle mixture at the high end (300 rpm to the rich side of max rpm). Then, be ready for years of enjoyment with that wonderful 4 stroke sound and torque, tick over idle, and easy starting.
Valve adjustments scare a lot of people away from 4 strokers, but I have had to adjust the valves on mine only twice for as long as I have owned it. Even then, it only took me 15 minutes to do each time.