Grumpy, I've had those mirrors for about 6 years now. For the price they're great, but if I was on the road for an extended period I'd probably look at something more permanent / higher quality. On an NM Pajero, vibration is minimal unless the roads are really rough and I've had the drivers mirror fold in 2-3 times (in 6 years) passing trucks on single lane roads at 100 clicks.
I'm happy enough with them. For what they cost, you can afford to carry a spare set.