I output it to a Roland Fantom X6 and BOSS Dr-880, and the sounds are just luvverly and realistic thank you very much, with BIAB's part in the proceedings being just excellent.
I output it to just about every synth I own.

Getting a great sound should not be an issue for the average Sonar user.
But the sound quality was not my reason for nitpicking: it was the quality of chords chosen in progressions. Mike Mc_Cue has one of those Flash gadgets on his site that lets you pick 'nice' chords in a progression, and I was doing some research on automating that, and give it a memory and a database of nice ones etc. when I came across that Mysong.
I just think that specific part of BiaB could see some improvement, 's all.
The first real programmable toolbox with a bit more abstraction than C, that lets me do the same as what I use BiaB for, but through code, and I'm probably instantly hooked, never to look back, because that would suit me even better. Currently investigating a Java toolbox that's supposed to be getting close to that ideal.