A must, despite the imperfections.

Some mistakes in French (some recurring, one feels that the translator is not speaking of origin) but very clear throughout with quantified routes and giving uneven.
One or two really clear directions, which lost us half an hour for example Landmannalaugar (farewell baths at the end of hiking, the more time ...)

Photos deserve to be more focused and of course many more.

Otherwise it is of course a must to get an overview of excursions on the spot, even for small marchers: most are within 2 hours, and no apparent hurry. So for a tour of Iceland, it is an indispensable complement to the Lonely Planet.