+1 on the slippy issue. When it is dry it is fantastic, but when it is wet / damp it simply aint fun. we went last year (3 experienced riders), i nearly had a horendous crash, god knows how I stayed on, one mate fell off twice, one quite hard, and the other had 2 small offs followed by a third horendous crash slitting his arm open badly. All crashed were tyre wash outs on the greasy surface.
Maybe we are just crap!, but it was like pure ice on some slaty sections. My brother went 6 months ago, again in the wet, and found it “interesting”
Definately worth a trip, but take care!
Kev