British and Irish Butterflies app - views? (1 Viewer)

Just noticed that there's a reasonably priced App version of Adrian Riley's British & irish butterflies tome. http://itunes.apple.com/gb/app/british-irish-butterflies/id376331398?mt=8

The most interesting element for me is the site guide (with grid refs, and for subspecies). Does anyone have the app or book who can give a flavour of the level of detail of these?

Cant comment much as Im at work! Had the book for a few years now and find it valuable when out and about. The site guides for each species primarily give grid references, with varying amounts of supplementary detail.
When I have used the book to visit a new site the information has been sufficient ie where to park, access and so on, and we have usually been able to locate the target species (or at least where they were supposed to be).
For the price, the app looks to be pretty handy, and much more convenient than carting the book (one of many butterfly, dragonfly and botanical ) that usually reside in my bag.