I just purchased an ebow a little while ago from Guitar Center. The ebow is a small electronic device that uses an electro-magenetic field to vibrate the strings. The result is an infinite sustain, which produces a sound similar to that of a bowed instrument. There are things about this little gadget that I absolutely love, and some things that I find a bit underwhelming.
I really like the idea of the ebow and the sound it produces. The device truly does make the guitar sound like a different instrument and the infinite sustain offers the player many new possibilities. Another thing I like is the compact size of the ebow. It can easily fit into your guitar case, bag, or even your pocket! You can hold it with just 3 fingers when you are playing. I also love that it works on acoustic guitars. Being a strictly acoustic player myself, I appreciate the fact that the ebow resonates a pure acoustic sound when played on acoustic instruments.
On that note, although the ebow works on acoustic guitars, it doesn't respond quite as well as it does on electric guitars. When using the ebow on an acoustic guitar, you have to hold it on the string for a good second or two (depending on which string), before it starts to vibrate the string. However, on electric guitars, the strings respond so quickly to the magnetic field that you can even wave the ebow over all 6 strings, creating a synthesized melodic arpeggio. You can also "bounce" the ebow over a single string, which produces a sound reminiscent of bowed staccato notes. These techniques will not work on an acoustic guitar. The other thing I don't like is that, when played on an acoustic guitar, you can really hear the frets when sliding from one note to another. This sound is highly audible, especially when recording.
Now, in all honesty, I'm just nit-picking with all these little issues. I really can't complain, especially when the ebow was designed more as a gadget for the electric guitar. Though I do wish it would translate just as well into acoustic playing, I think the ebow is still a really awesome tool for any player looking to discover some new sounds. Even with the pricey retail tag of $135 (most retailers sell it for $99), it's well worth the money if you put it to use.
Below is my arrangement of the song "Tapion's Theme", which demonstrates what the ebow can sound like on an acoustic guitar.




