I haven't found anything better than Smartnote. I've tried several and it generally works the best of all of them for me. The only time I had an issue with the page moving with the stylus was when I failed to click on the "create" button after drawing the palm area. Otherwise the page has stayed stable. I have the Pogo Sketch also and set the black pen to the finest (1) and save it. Its as fine as I write in real life. I read somewhere when I was searching for a good notetaking app that if your screen has greasy fingerprints a harder rubber stylus works better but I've only tried the Sketch and am happy enough with it.
There are a number of these apps but I just haven't found snything better all around. BTW if you have issues you might email the developer. I had a question and he responded almost immediately. There's also a pretty good pdf help available.