i have a 2012 S5 VWD - unfortunately there is a massive handling difference between this and my 2016 R5, 2018 R5, and 2018 S5 bikes. The 2012 S5 is twitch and unstable descending compared to the 2018 models. I am a good descender, being able to match times with the pros down our descents here in stages of the Tour Down Under, Adelaide, Sth Australia. I am unable to get with a minute or 2 of my descent times on the 2018 bikes with the 2012, and trying to descend fast on the 2012 S5 produces poo in pants moments quite often. The 2018 bikes are similar across the R and S models for handling.
the other downfalls of the 2012 S5 is 23mm tires are all u will fit on front and rear. The head tube is also tall, and very flexy, if your a decent sprinter. If u want to run a low bar position the u have to resort to -17 deg stems.