I did the arete route last weekend,it was cloudy and we didnt see much sadly. Its a fab walk though and deffo the way to do the Ben.
I must admit I was nervous about it,I had read loads of walk reports and standing on Carn Mor Dearg summit, I was very apprehensive when seeing the arete appearing from out of the cloud. I went for it though and was so glad I did,its not nearly as bad as you think it will be,its fun picking your way over the rocks.There are only a couple of exposed parts and these can be bypassed by the path on the left if you are really nervous. I loved it! I would say go for it,take your time and enjoy!...the real fun is the slog up the Ben after the arete!..nothing difficult but after all the effort of climbing CMD and the arete it seems never ending!..lol