A " Rider " retrospective written in 2015 called it an " exercise in simplicity, with clean, spare design that projects industrial efficiency ", especially in contrast to the overbuilt Suzuki RE5, while noting both rotary powered machines are "'orphan bikes'. . . innovative but not commercially successful . " Another 2008 retrospective noted the high insurance costs ( due to erroneous swept volume calculation ranking it with high-risk literbikes ) and said " Every buyer with an ounce of common-sense, or logic, avoided the Hercules like the plague and the bike sold only to real biking geeks who delighted in the absurdly quirky ."