I have an Aphex Aural Exciter (same idea as the BBE, different brand name, more knobs), and I've never once said "OMG this sounds so much better!", nor have I noticed an appreciable difference in my tone while playing live.
The enhancement is so subtle that the only time I notice a real difference is when I flip the unit off and on while playing. If I would start a gig or a jam session and it was accidently bypassed, I don't think I or any of my bandmates would notice any real appreciable difference, and nobody would ever think my tone sounded bad in any way without it. It won't be the cornerstone to an amazing sounding rig... like, it's not the kind of drastic tone shaping that makes a poor rig sound awesome. It's more about subtle tweaking to make a good thing just a little bit better.
Now, on the other hand, I have a pretty high end Mesa Boogie cab, and never run the Aural Exciter at 'extreme' settings anyway, which sounds too unnatural and boomy... It's possible the "enhancement" would be more beneficial/noticeable on a less awesome cab. It also is a pretty nice unit for recording and mixing, though I haven't used it extensively in that regard. It did really helped fatten up my keyboard for some tracks I did though. If I ever put a synth rig together it would probably be involved in some way.
Overall verdict: Decent unit for some purposes, not useful live. Your money is better spent elsewhere. *cough*sansamp*cough*
The enhancement is so subtle that the only time I notice a real difference is when I flip the unit off and on while playing. If I would start a gig or a jam session and it was accidently bypassed, I don't think I or any of my bandmates would notice any real appreciable difference, and nobody would ever think my tone sounded bad in any way without it. It won't be the cornerstone to an amazing sounding rig... like, it's not the kind of drastic tone shaping that makes a poor rig sound awesome. It's more about subtle tweaking to make a good thing just a little bit better.
Now, on the other hand, I have a pretty high end Mesa Boogie cab, and never run the Aural Exciter at 'extreme' settings anyway, which sounds too unnatural and boomy... It's possible the "enhancement" would be more beneficial/noticeable on a less awesome cab. It also is a pretty nice unit for recording and mixing, though I haven't used it extensively in that regard. It did really helped fatten up my keyboard for some tracks I did though. If I ever put a synth rig together it would probably be involved in some way.
Overall verdict: Decent unit for some purposes, not useful live. Your money is better spent elsewhere. *cough*sansamp*cough*
Flats are going to take you the opposite direction anyway of where you're looking. What strings do you have on it currently?