Those are mine. They are now 2 years and 2 months old. The Bosch model, was obliged to buy them in Greece in December 2005 for eu38 the pair, as I could not find who supplied those or the Valeo equivalent in the UK, and the cheap ones didn't exist back then! Well, in reality I found the Valeos for £18/piece
and thought it was a bit dear for something I had never tried!
Anyway those are the C5-specified ones (also Alfa 156 if I remember well), different size each -passenger smaller than the XM's, but as u can see it fits great and adheres well on the glass curvature-. Very happy with them and not showing any signs of wear!
I stopped using any kind of detergent with those as they wipe so clean that they made the glass screeeeeetch -they need just water for a perfect, screechless cleaning-. Antifreeze is not a problem. The clips in those ones pass unnoticed.
Last, but not least, I believe that, aesthetically speaking, these are the wipers...the XM was made for! Shows what an advanced design it was -and all the rest of these Bertone wedgy-shape things!-.
cheers
G