The boost kit can generally be setup well'ish, it just takes some playing around.
The fact it uses the same solenoid as the AVCR is not as important as you might think. From eye, it looks very similar to the unit used on the E-Boost (which, how ever overpriced i think it is, IS a good unit when setup correctly) The solenoid itself is a "tool" if you will. Its effectiveness is up to the person wielding it (that 'person' being the microprocessor in this case)
If you do hock ~$600 on an EBC btw, I'm heavily biased here... but you cant beat the Blitz DBC... along with the Jaycar controller (requires tinker time)