I've got these on a bike having just replaced Gatorskins...they are as slippery as a very slippery thing especially on wet metalwork!
They may just need to be broken in more, but scary at the mo in the wet (almost got dumped in the road in front of a thousand tourists and shoppers going round corner from Charing Cross Road into Oxford Street
) ... I may have to stick some Zaffiros or Rubinos on if I am going to use the bike in the wet
They've been in the parts box for a few years so maybe they've degraded, but look fine 🤷♀️