This is what observers say about the German edition of interstellarum Deep Sky Atlas. The contents are virtually identical.
Owen Brazell, Webb Society, Galaxies Section Director: Unusual features of the atlas include marking up dark nebulae, something often overlooked on modern star atlases, and marking up many deep sky objects by popular name as well as their common catalogue numbers. The fine detail charts of many areas of sky including common Abell clusters is also a nice touch. Another nice touch is the use of the visibility criteria calculated from the software Eye and Telescope which gives you some idea of what you may be able to see. Overall I think this is the best addition to the deeper sky atlases that has come out in a long time and will certainly be a major part of my observing kit from now on.
Glenn Chaple, columnist Astronomy magazine: Co-authors Ronald Stoyan and Stephan Schurig have created a masterpiece - an atlas that not only plots thousands of stars and deep sky objects but also, through symbols and color codes and shading, shows their visibility through telescopes of various apertures. A perfect marriage between star atlas and observing guide, the interstellarum Deep Sky Atlas is a must-have for the serious amateur astronomer.
Dave Eicher, Editor-in-Chief Astronomy magazine: This is the first atlas that really has the deep-sky observer in mind.
Wolfgang Steinicke, Webb Society, Nebulae and Clusters Section Director: Some people think that the time of the large printed sky atlas is over. This is due to the great success of planetarium programs with all their digital features. Indeed, the paper versions get rarer, but this does not diminish their value. They are still essential, both for preparing an observing session and at the telescope. So the new interstellarum Deep Sky Atlas is much appreciated. This is mainly due to its sophisticated concept and perfect production. The atlas is both comprehensive and practical. It offers a complete set of deep-sky objects, chosen by the concept of observability. The presentation is excellent. The atlas will be a helpful companion – at day and night. For the letter, Oculum offers a waterproof field edition. The interstellarum Deep Sky Atlas is a must for every observer – against all digital temptations.
Tom Trusock, cloudynights.com, Head Forum Admin: Ronald Stoyan and Stephan Schurig have accomplished something new with the interstellarum Deep Sky Atlas. The concept is simple. Items are colored according to their brightness. The fainter the color, the more difficult the object is to observe visually. The front of the atlas gives rankings for 4", 8" 12" and larger telescopes, so given your instrument, you have immediate access to a quick reference of available targets. Physically the size is quite handy. With stellar magnitudes dropping to around 11, the maps are detailed enough to find objects visually, but not so detailed that one is overwhelmed by the field. Additionally, the individual maps are not so large as to be unwieldy in the field. Concerns that the colors would be hard to differentiate under a red flashlight were unfounded. It's not the specific color that matters but the intensity. It's not often that an atlas brings something new to the table, but this one has managed it.