Hi.
I've evaluated Flexible Balance Analysis in SpectreRF
since "MMSIM 6.0 USR1" and "MMSIM 6.0 USR2".
These were very inferior than HB-Ana of ADS
and helpful only for very small circuits.
Of course FB-QPSS was far helpful than shooting-QPSS.
So I concluded that FB-Analysis of SpectreRF is very inferior
than HB-Ana of ADS, so we've not adopted it until now.
I've expected remarkable improvement in MMSIM6.1.
But my conclusion was never changed.