I played a couple when I was trying out new ones last year. Both vintage ones were like boat anchors (which might help with on the knee balance) and didn't feel like vintage instruments particularly (I've owned a '63 P in the past and that had a certain something), they weren't anything special. Of course this was just 2 that might've been poor examples.
There’s some confusion here, it appears they may have listed it twice. I have queried this by email (my phone signal is very patchy at the moment), give them a bell if you’re interested and I’ll update the link in the OP.