Very nicely done! I've used an EFD dispenser for a long time, but it requires I keep a bottle of Argon around to drive it (no clean shop air in my lab). The argon is not expensive, but it is inconvienent, and if I want to move the EFD around, it's bulky, and has 3 cables plus the air line.
The i-Extruder, on the other hand, is highly portable (I use a USB battery pack sometimes), just as accurate and repeatable as the EFD, and LOT easier to use, and no 3000 PSI pony bottle of Argon to lug around.
This is truly a great product. Very well made, and the kind of project that other Kickstarter entries should use as a reference.