I have not bought iAnnotate ... but I hear nothing but good things about it. I'm considering making this purchase. However, I am HIGHLY impressed with UPAD! And, to my surprise, it has three modes of operation: Regular Handwritting Docs, PDF Editing, and Writing on Photos. After trying several handwriting apps, ( NoteTaker HD, HW Mail, Penultimate Etc ... ) I am very impressed with UPad! It solves the problem of resting your hand on the display PERFECTLY! It also allows great magnification window handwriting, BUT, the engine to smooth and follow intended strokes is so good, that you really do not need the magnification tool, even when trying to write small. IT allows text to be typed, and has transparent HighLighter pens as well. The UI is fantastic, very easy to follow (much better than NoteTaker HD IMHO ). But the fact that it can be used to annotate PDFs is no small "add in". It's very intuitive, controlled, and functional. It's offered for free (UPAD Lite) for one to try before you buy. I was curious to see if heavy iAnnotate users would try this app ... and make comments towards the subject of PDF annotation between them. Thanks, Richard I look forward to following this thread ... thanks again if you decide to contribute.