I have made the drive over the cerro route however it was years ago,the last time in 92, still l bet the same problem exists and you may not be able to avoid it as it the quality of the road south of San Isidro has been notiously hard to maintain as it follows a river valley with steep hills/mountins on either side and poorly built culverts which used to allow water to wash over the road leaving deep potholes and wash-outs. Let me know if anything has changed. If you encounter that situation, drive slow and avoid the potholes at all costs as hitting them at any speed will cause a blowout.
On the plus side the ride through the cerro passes througha cloud forest and gets really cool and mysterous, like traveling through the Moors (I imagine) would be. i woud take the mountain route just for the experience and picture taking opportunity. One other thing please wrte a trip report, it might be intrestng to read one that doesn't start and end with negotiating a working girl down to $60 bucks for a bbjcim
