I've completed it in 2005 in sections.
It's a very nice walk with stunning scenery (sometime it's also possible to spot seals in the sea
), with a lot of ups and downs, but not as strenuous as an alpine walk.
I can't advise much on accommodation because I've done it a long time ago and likely much has changed, but I stayed in a mix of B&B, camping, friends and sometime I've just done day hikes and went back home since I was living nearby in that period.
For me the only draw back was the constant wind, not cold, but relentless. To limit the ill effect it had on my body and especially on my mind I used 2 Buff: 1 for my head under a baseball cap to cover my ears and the back of my neck (I don't remember much shadow on it) and one on my neck which could cover also my mouth and nose when needed. I also used large sunglasses which covered also the side of my eyes (the one designed for cyclists worked great). And, of course, I had to tie everything I wore down very well to avoid the noise of continuous flapping that made me crazy.
The paths were well kept with a lot of cattle gate crossing and everything was very well marked.
To plan it I used the book in the picture below which, I believe, it not going to be useful anymore.
Other than that it's a walk that I recommend since I've liked it and I didn't find particular difficulties on it.