Hi Matt,
I have tried the Neurosky device and it works very well for what it does - a single channel of EEG with no mess and quick setup at low-cost. It has a single dry electrode on the forehead - goes on just like a pair of wireless headphones. With the one forehead electrode, you get a combination of EEG, forehead EMG, and even eye blinks and it is relatively easy to extract these three components from the raw data. There seems to be a pretty aggressive 60Hz notch filter (you can see it in the frequency domain of the acquired data). The Bluetooth connection takes a little while to connect, but once connected things go pretty smoothly. I think this is the perfect device for teaching some basic physiological monitoring and biofeedback concepts in a undergrad lab or even high school setting - safe, easy to setup and use, but versatile enough to get into some signal processing concepts.
Steve
