Hey Biggsy,
Synthetics are smoother and harder than wood, so the ball travels faster in the oil and often snaps off the dry as a result of the pent-up rotation. The faster ball speed you get on a synthetic surface at the pins can cause more corner pins, so you sometimes have to rethink your starting position and ball surface to accommodate this.
The "bang" as the ball lands on them is disconcerting at first. You'll tune it out or start laying the ball down earlier soon enough.
Synthetic houses tend to lay easier patterns, as hard patterns play really hard on them, to the point of being just plain unpleasant, so it's by no means something to be worried about. It's just different.
A few people have mentioned approaches. As the surface is smoother, they can stick or slip more than wood, especially if the humidity is getting beyond what the a/c can cope with. Just test them out across the approach before they switch 'em on and you'll be fine as you'll know what to expect.
Cheers,
Jason