In the past six months I've become an avid supporter of PDF-XChange Viewer as the best PDF viewer (freely) available. I've installed it on well over fifteen computers, belonging to my family, girlfriend, girlfriend's family, etc. Suffice it to say that I'm very impressed with your quick & very functional software.
But I do have a problem. I'm a tablet pc user and, since I'm also a college student, I seriously value commenting, markup, and annotation tools for use with PDF files. I've tried several programs, including PDF Annotator, Bluebeam Revu, and Jarnal, but none of them have kept me satisfied. That said, I can't keep working with PDF-XChange Viewer's weaker annotation tools for much longer. I need two major changes to the current tools:
1) The highlighter needs to be able to highlight anywhere I put the cursor/pen, not just the recognized text. I often write little notes with highlighters (to save myself time) but that's just not possible in the tool's current form.
2) Equally important, the pencil tool has got to lose those little blue boxes that appear around every drawn line. It is very difficult to handwrite any kind of quality sentence using that tool and this is a must-have feature for serious tablet users.
As I said before, I'm a huge fan of PDF-XChange Viewer. I'd gladly pay $20 to $50 for this program if it just added those two features; no other new features necessary. But, as it stands now, I've got a long semester's worth of PDF documents to get through and I need these tools sooner rather than later. My wallet is on the table next to me and I'm very ready to spend it on whatever program will get this job done; and, sorry as I am to say it, Bluebeam's [bloated] Revu, coming out with version 6.0 soon, is looking to be the likely candidate, unless I hear some good news from a Tracker developer.
Thanks for all the high-quality work, developer(s). Hope to see more of it soon!
P.S. - You know what? I'd even donate $35 to Tracker Software if a developer simply promised me that they'll get those features in soon.