Yeah I crash at cutscenes, gotta skip em, pretty annoying.
Synchro is renewed each day it seems, and gives 5x EXP and 5x item drop rate for a certain amount of exp (About a level?). Quest exp doesn't affect it, only monster does. Once you get enough EXP from monsters, Synchro is done for the day, and you get normal rates.
Normal rates are retarded. At level 9, I had 60K exp to level. Each kill gave me about 6 exp. Jesus. The rates felt right with Synchro on. Synchro seems to keep power leveling and level gaps to a minimal though, to the point it seems casual. You can use up your synchro and level at least once in about an hour or two. You might get 2 for 4 hours.
Farming the materials needed to create nanobots aren't as bad as I thought. If you grind on something about 4 or 5 levels below you, it'll take about an hour to get 30 materials from that monster. That's WITHOUT synchro by the way.
Synchro does NOT affect nanobot exp by the way, so you can level your nanobot as much as you want.
I finally fused 2 nanos, and I got a dual blade.