Well, i took my 2027 to an acoustic gig last night, knowing that if it didn't really cut it, he had a spare acoustic i could play on.
The biggest problem was i didn't have time to check my tuning before i went over- i was at a party for a friend of mine who just came back from DC for the summer, and since i had't seen the kid in a few months, it took me longer than i thought it would to get moving. And, since i had forgot my wrenches (had them out for reworking my 7620 to get it ready for sale- offers welcome, by the way
), i could only compensate with the fine tuners, and it wasn't quite enough. I could hide it with vibrato for leads, but for chording, it just didn't quite sit right. So, i switched anyway after 3 songs (I'm stubborn, and i consider myself a horrible acoustic guitarist)
Tonally, well, it wasn't too bad. Flat out of the box, will it sound just as good as an acoustic peizo? no. I noticed the acoustic i was playing later was WAY more compressed naturally than the peizo was, so right off the bat you need something with a decent compressor. This wasn't too big a deal with rhythm, but for bluesy leads (i got into the sRV-ish habit of snapping the occasional bend with my middle finger, and i haven't managed to make myself kick it just yet), the dynamics were just too different. It wasn't as "clear" as the acoustic was, too- a little muddier in the mids.
That said, before the thing died (currently being ressurected, i hope), i used to plug it into a modified patch on my J-Station- one of the bass models, with some compression and reverb. sounded scarily real through my stereo. :-)