We use them, but only if the weather's bad. That is, close to Cat 1 limits. Then the FO always gets to be PF, expecting to do the missed approach, and the Captain is the one looking out. When he sees the runway he takes control and becomes PF. If its an autoland, the FO keeps it until main wheel touchdown.
I think its good in bad weather, or possible bad weather. However, when its CAVOK its nice to just to a nice little visual circuit into some places we go.
I have had the experience of getting the weather, and it was something like "few at 4000 feet". We got there and the Captain was flying it and it was rubbish, right down below minima, and that did get a bit confusing as the Captain was then PF and making all the calls like "100 above" and "decide" to himself!
But 99% of the time it works well.
Don't want to see it for all approaches though, I think most pilots like to plan and fly their own approach and landing.