usaski1 - here's my weekend report.
I upgraded my 97 Nautique (already Stargazer-equipped) with no issues. It was an easy installation, course mapping worked out of the box and based on the beeps and times worked the first time.
We started and stayed with the B2 setting and to me and my ski partner, consensus was that the pull felt very similar in feel to the ZO boats we have skied.
From a driver's standpoint, we noticed additional engine revving during the pulls (just like ZO boats and consistent with the videos on this thread). As previously noted, this upgrade does not fix any of the set up issues that are well known for Stargazer. If the system engages too soon, SG hunts around for speed and you can be way off on speed through the gates.
The net, net is that I am glad to have upgraded and believe it is a tremendous value (compared to the cost of upgrading to a ZO boat). I am sure this will better prepare me for skiing behind ZO boats, and it still drives just like a SG boat.