I've used it but its predictions of good or bad fishing have never been right for me
Its all very well for a website to predict bite times for any particular area. But in doing so it has made the assumption there are actually some fish there to do the biting. A prediction of a very good bite time at spot x is of no use if there are no fish in the area at that time.
What we need is a website that tells us where the fish will be. Now that would be useful information