In reply to cragtyke:
Oh, UFOs!
I have them since a few years, as they are not made of metal and can therefore be used in Elbe sandstone. They are great, much easier to place safely (more precisely, much easier to place in a way that you can trust) than knotted slings, at least at the larger sizes. Opened up a whole new set of routes for me that I could technically climb but was not happy about the pro, mainly splitter cracks.
Never mind the cowbells, I think that they would also be good for certain routes in the Peak where erosion of placements is an issue (some route at Birchen comes to mind, but it has been a while. Topsail?)
CB