I am using it as a reader (no need to modify documents).
Excellent combination of supported formats, ability to open multiple tabbed documents, full list of search results through the document (not single "next" result, as in most readers).
Used NGWave for a long time, bought and paid for and came back to buy the newest for Win 7. No Joy as the web site and all emails to support, info or buying at NGWave a returned undeliverable. So beware... the software will not save a file you work on because it is unlicensed. Sad to see a good product disappear.
fast and powerful