I'm on a shared host and so can't use more advanced object / DB caching methods (with shared hosts, memcached or APC is bound to end up in trouble sooner or later) and therefor am more than happy with WP Super Cache or WSC.
The thing is, I (unfortunately) have to use Bad Behavior also and that's another reason I'm happy with WSC. However, I'm not sure whether that therefor inexorably means setting WSC to legacy mode, or if PHP mode would work too. And on a shared hosting package, every little bit helps, so if PHP really works with the WSC plugin active, I'd be happy, but I want to be 100% sure, first.
Can anyone provide me input on that?