..over here, CE and ISO are no safety certification as I'd wish to have for a ride like that..
CE is a certification by the manufacturer himself: I declare conformity to standards, but this is just not independent.
ISO certification concerns the effectiveness of quality mgmnt processes, this is done from independent organizations but then it doesn't touch the "does-it-work-safely?" question.
Has this ride been independently checked / certified concerning it's working principles and endurance limits (MTBF vs MTTR)?