The idea is great in itself and is fun but a financial and technical meltdown! Too Bad.

PRO

++ Optical appearance and feel is great!

+++ General painting functions with the 'Paper' app (iOS 8) per se are also very good! App and functions of the post are apparently updated by the manufacturer also and expanded, which is of course desirable.

CONTRA

--- However, Radiergummifunktion has the pen itself only the first 30 minutes works as it should. Then she reacted almost exclusively so than if you rumwischt his finger in the drawings. One must choose the Eraser tool manually so yet again. Seems to be a common problem with this pen, although there is on the net a couple solutions to this problem but at the price of the device is acceptable.

---- The worst, however, is the painting tip! Expected generously kept the me only about 7 hours. I had previously read that the wears off pretty quickly, but that the tip is broken faster than the battery of the pen is empty, is really bad! Battery status of the pin is still full.
Just because I did not want the tip by sharpening so fast with me, I have worked very carefully. I'm not a professional illustrator or similar, in my few drawings so not so many lines come together justifying the wear.

NEUTRAL
The App or the entire additional functions in the app there is, so to speak free on - you will be released each time for registration of the pen for the next 30 days, so to speak permanent.
For the price of the pen I find the 'free' app but the least that can be expected and is not worth a pat on the back!

Have the stylus bought before Christmas for 59, which is in itself quite steep.
Now, 3 weeks later (January 2015) will cost the pin 66
Ridiculous! Of this I can only advise!

If you really work with the pen can be adjusted to 1-2 replacement tips per week, which would also each time 5 per spike! The replacement tips are often sold out - surprise, surprise - if you're unlucky then you sit so still on the 'dry'.

CONCLUSION
Even if I do not want to admit it because the part has fun in itself, I will send back the pen. The fun is to me at the price and the follow-up costs too high, moreover, the function problems when using the eraser.