Been using the new trent pens for a few days now with a variety of note apps. They are all just ok. Some are slow, some are relatively quick, some are not so easy to use etc. Conclusion, there is no one great writing app. I'm using lecture notes right now which "seems" the most feature rich, quick but still has some usage deficiency. None of them have adequate palm detection so you always have to write with hand up. Its not comfortable for me to write that way.
The pen itself represents the majority of the problem for me right now. Tip is too thick. Will keep trying to see if this works out. But its iffy.
I may have to wait for something more like microsoft surface which will have 2 sensors so it should be able to work much much better and can do palm detection properly. But I'm hoping there will be some improvements on the N7 side because the N7 is exactly the same size as my physical note pad that I normally use.
Update: 8/3/2012:
So I've been using the Trent stylus with lecture notes for the past week. My thoughts are that its usable but its very unfriendly.
The stylus tip in my opinion is the biggest problem. Its too rounded and soft. Its almost like writing with a brush. If there were stylus pens out there with a much more narrow and firm tip it would probably work better but I'm guessing for a capacitive device thats just not going to work.
Software wise, lecture notes seems to work better than others that I have tried. Lecture notes is pretty quick with the strokes. I like that I can set a default size to the lines. Thats important. Most apps have lines that are too compressed. Also, you will end up writing letters larger than you would on paper because of the stylus and nature of writing on a tablet. I found that writing in landscape helped a lot otherwise zooming in, you will end up doing a lot of moving the screen left and right. My text is legible but its kind of ugly. For casual notes, this is probably good enough. Editing of writing is pretty good.