Confused by all the bad reviews

I really enjoy this app. Visually its very pleasing and provides time, tide, season and phases of the Moon at a glance. I dont use it to navigate, just to stay tuned into the rhythm of the tides. I found it difficult to set up, but take the time to figure it out and you will be rewarded. Toward that end clearer, more complete set up directions would be helpful and probably eliminate some of the bad reviews. It would also be nice to have a little history about tide clocks, the calculations needed to make them work, etc. I would definitely recommend it.

3ringbinder about Tide Clock