If the current software version of SG is 8.0, I might agree that the zbox is an iffy add on. But if the only way to get to the v. 8.0 software is with the zbox, I'd say get it. The system locks in so much more quickly for me with this software, which was designed for the zbox as 8.0z. I know some have struggled getting the zbox working for them, but I saw times within 0.02 seconds ball to ball out of the box. I have felt it was a fantastic upgrade, particularly if you are going to ski tournaments and will be seeing boats with ZO.
Previous: 1993 Prostar 205
Red 1998 Ski Nautique, PCM GT40, 310 hp, , Acme 4 blade, Perfect Pass SG/Zbox.
Be kind. Have fun.