Given there really are no other guides to tube radios out there. Is that any reason to praise it?1. Far two few photos.2. Inconsistant descriptions.3. Some common radios not listed.4. Prices are beyond ridiculously low. (They may be correct if your buying a radio from your Grandmother in Idaho. )5. No history or information on the manufacterers.Unfortunately this is really all there is, and if you collect tube radios you have to have something.