Good call, Roger is right. This iSonics are exciting in the right hands, but not fun in the wrong hands. In time, you will get to the point where you may want to try an iSonic, but test drive one before buying if possible.
The biggest advantage for intermediate sailors on an iS is the quick planing compared to other similar sized freeride boards (wider tail), but once moving, it can get wild pretty fast if there is much wind.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.