Have used with a sailing group extensively, great piece of kit for safety fleet, completely underestimated by most.
310 + 9.9hp is not fast, but agile. Takes a force 6 when driven correctly (airbourne every other wave) and can right a capsized wayfarer dingy if used correctly.
Big brother 3.45 with 15hp even better as it has speed to keep up with 5m with 50hp, yet still agile!
Simple fun workhourse.