I bought an Ibanez AEB 10 used from a friend, thinking I would do the very same thing: practice and play during my lunch hour out a park or something. While I did enjoy it, it IS large, hard to see the frets (had to use a sharpie to make dots where the frets are on the side of the neck).
I played it in church once, with an acoustic guitar, but hooked up to the PA, sounds the same as my electric. Played it about 6 or 7 times total, mostly collecting dust.
I just sold mine on CL, helped pay for a new Squier CM P bass.
I also just use an interface to my ipad/iphone now with my bass for messing around on the back porch or whatever.
Sounded like a good idea at the time, and I did use it, but it became used less and less.
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