It seems to me there should be some less direct way to measure competence of personnel besides the patient being revived with intact memories. I believe this kind of feedback mechanism was the original goal of case reports. Perhaps having everyone wear video glasses and audio recorders would be ideal. The more detail of what actually goes on is available for review (not necessarily to the public for patient privacy reasons, but perhaps to independent experts) the less likely mistakes will be repeated.
I recently found something that may be of concern to some of the readers here.
On her blog, Melody Maxim, former employee of Suspended Animation, provider of "standby services" for Cryonics Institute customers, describes several examples of gross incompetence in providing those services. Specifically, spending large amounts of money on designing and manufacturing novel perfusion equipment when cheaper, more effective devices that could be adapted to serve their purposes already existed, hiring laymen to perform difficult medical procedures who then botched them, and even finding themselves unable to get their equipment loaded onto a plane because it exceeded the weight limit.
An excerpt from one of her posts, "Why I Believe Cryonics Should Be Regulated":