I found Geniuses to be rather odd shoes - very good on vague smears and bulges but notably terrible on big polished, positive footholds. I particularly recall a particular finger jug on Cold Steal - the best foothold on the route - where I may as well have worn rollerskates).
When they are good, they are very good, but I would always have a pair of normal", non no-edge rockshoes in reserve in case they do not suit the route. This is for sport lime, mind, their vaguaries are not so readily apparent when indoor blob jumping. Incidentally, despite Futuras often being regarded as the slipper version of the Genius (not to my mind, they might also be no-edge but have a differently shaped toe-box) I have never had any problems with them - best all-round shoe I have ever had (only the pain of breaking them in puts me off buying another pair).