Smart Pen For Math Writing

Next month I will begin to learn in the university, and I am not sure if to buy smart pen such as Livescribe or Logitech IO 1/2 to write math with.(handwriting is not an option)

The problem is that I am not sure if these pens are comfortable, if they are easy to use and even if they are appropriate for math writing.

Are these pens really worth the price and appropriate for math writing?

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I saw many students type with Lyx on a laptop, consider it –  Belgi Sep 20 '13 at 10:18
Why is handwriting not an option? –  Avitus Sep 20 '13 at 10:20
I highly recommend handwriting, because TeX (what lyx uses) will use too much time, especially if you're not familiar with it. Why should handwriting not be an option? You can still typeset the notes at home or scan them if you need them in digital form... –  AlexR Sep 20 '13 at 10:21
Related question on MathOverflow: Digital Pen for Math: Your Experiences? –  Martin Sleziak Sep 20 '13 at 10:30
I'm a big fan of hand-writing, too. It's much more flexible than things like Lyx or TeX. For example, you can sketch little diagrams, scribble arrows connecting things, highlight with boxes or underlines, etc. There's some merit in having the notes in digital form, so either scanning or a smart pen are advisable, I would say. I don't know if smart pens work well, but I know that scanners do. Next step is to get the notes into editable/searchable form. OCR might help a bit, but you'll probably end up re-typing anything that's important to you. A bit off topic, but I hope it helps, anyway. –  bubba Sep 20 '13 at 10:42