It is a great little river. Is it worth it... umm.
A day ticket for salmon/sea trout on this water is £13.50 and a week is £35. Brown trout £3/day £10/week.
But then the whole point of the AST auction is to give money to a good cause

The choice is yours!
Salmon fishing can be good if you hit a spate but it is nearly all worm or spinner, the river just wasn't made for
salmon fly fishing. On a summer spate it can get very busy with salmon anglers, I prefer to fish it before June 16th

Two days fishing in good water should give you a salmon or two. Sea trout fishing is a shadow of what it used to be but sometimes a reasonable run of peal (small sea trout) turns up.
Trout are small and plentiful. The river runs in a very deep wooded valley and fishes well in even the brightest weather for trout. Working up through the runs and pools with a dry fly on a summers day should see you catching trout left right and centre
Although the area is very popular with walkers they don't interfere with the fishing to any great extent. I've never felt inconvenienced by them. There is an excellent tea rooms at Watersmeet half way up the stretch, ideal for refueling!
Andy