It does work but you need to double check the result setting, in particular the distances and the levels.
If the distances are close to the real measured ones and if the decibel levels are not wildly changing from band to band then it's probably OK.
If, on the other hand, the distances are way off and the levels changing from +5db to -5 db its probably the system is trying to correct for strong resonances and I don't think it's sophisticated enough to do it correctly. In this case I would leave all the settings on default.
It's also a good idea to do the auto setup with the mike placed at a couple of other places, couple of feet away from each other and compare the results.
