Amazing! I've dove in Hawaii a dozen times and it doesn't get any better than with Dillon and Harmony. In the past, I've only done boat dives in Maui, but they reminded me how wonderful a shore diving is. No time wasted on the boat (usually going somewhere you can kick out to anyway). Max depths of ~35 feet means 55+ minutes bottom time. Mala and Black Rock are two of the best sites I've dove anywhere.
Also, I highly recommend the twilight/night dive combo.