In reply to minty1984:
As others have said head torch is essential and I would highly recommend a helmet as whilst the rock is solid it's also low in places.
If you want a walk, go up the path to the left of the cable car (can't remember name) there are a few short sections we did use lanyards for, but would have been happy without as really easy scrambling. One short (solid) bridge) and look out for the tunnels - well worth exploring off the path.
Coming down through the main tunnels (from cable car or walk up) is excellent and well worth doing, as others have said the cable is really just a handrail so we never bothered with lanyards even though we had them with us.
Another well worth doing trip if you like tunnels (you will need lanyards and headtorch) is VF Giovanni Lipella. The first part of the route is inside tunnels and easy going and there is a bailout from where you could reverse the route or traverse over to the descent used for Col De Bos. The next section is sustained grade 3 and it's a long way up to Tres Deita, the top section we didn't do but apparently gets even harder.