I once read a description of Cat Bells which said that this was a fell that you could take your Granny up, and while I'm not trying to generalise the fitness of Grannies, the northern ridge is somewhere that she might want to avoid. I'm sure the various approaches from a southerly direction would be much more agreeable as they steer clear of a couple of short rocky scrambles.
I sometimes think this fell is viewed as an easy option, and at under 1500ft (less than half the height of Skiddaw), an experienced fell walker might be right to say this. I have however seen more then a few people turning back once they each the rocky section on the ridge. Perhaps not somewhere to bring your Granny after all.
You should note that Cat Bells has been popularised more than most fells, and as a result, is often extremely busy. From a distance you can often pick out the line of matchstick figures stretching up the skyline. All steadily making their way to the summit where I'm sure they'll find the place crowded with people all trying to find enough ground to sit and enjoy the view and to have a bite to eat. What a shame that most of those people leave the place with the impression that this represents fell walking in its entirety.