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I like my ACase 2nd Gen. It's longer than the Targus stylus and feels like using a regular pen.
 
I bought a dagi and Griffin on amazon.

best so far is Griffin it has a rubber tip which offered good resistant than the plastic tip of dagi (which is good for precision)
 
I have both the Pogo Sketch and the Boxwave Stylus. After using both extensively, I much prefer the Boxwave stylus, especially for taking hand written notes.

The tip is a bit firmer and allows me to make more precise marks versus the the more flexible, squishy tip of the Pogo.

Google "boxwave stylus" for more reviews and opinions...
 
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