Instability costs time, time is unrenuable

There are several nags, but the stability of this program decreases with increased use it appears. It is frustrating to be digesting a research article then it just poof quits. (it just quit on a 3 page PDF file which is why I am writing this review).
-quits unexpectedly & frequently
-often will not open
-will not open PDF files that preview opens immediately
-Frequently will NOT SAVE ANNOTATIONS, but acts as if it does (with command s)
-there is no quick undo button to undo any annotation another tool must be selected (command z does not work) this becomes annoying and slows down the flow.

If you value your time do not buy this application. I keep giving it chances and it has failed enough where any benefit of feature is crushed by unreliability.

firecrossthesynapse about PDF Writer