The ability of SAM monitors to adjust them selfs to the environment they are placed in is quite remarkable.
Therefore, I think it is pointless of paying extra for SAM monitors, without investing also in GLM kit. It really makes all the difference.
GLM kit integrates smoothly with GLM software and makes the calibration a breeze. It does what it should and it does it well.
On the other hand, since all the processing is actually happening inside the monitors' DSP circuitry, and the software is free to download, I don't quite understand why is the GLM kit this expensive? Also, the microphone feels very cheap and fragile. The housing is made out of plastic, and the cable and mini-jack don't feel particularly of a high quality, which is very surprising since Genelec is known for amazing quality and robust feel, all made in Finland.
All in all, I am very happy with it and I would recommend it.