I'm further skeptical about the ability of the inventor to interest a wide range of apps in supporting his product. Time will tell, but the fractured market for handwriting apps presents a big challenge. Finally, I'm rather skeptical about the juice the receiver is likely to require and the fact that it apparently cannot be used with the iPad connected to a power source. As an analog, I have the WOW iPad 2 Chargers
for audio from SRS for the iPad. Does a great job of enhancing audio but drains the battery of the iPad rather significantly while it's in use.