My objection is not so much that she isn't signed up but that she has no plans to sign up, even when her moral outrage issues are resolved. So if it is to be considered as a criticism at all (and your comment seemingly supports the notion that it is), it's not simply a criticism of the cryonics industry, but of cryonics itself.
What makes it suspect to me is that she argues as though it is a criticism only of the current cryonics industry and yet makes no defense whatsoever of the general notion of cryonics (except a very vague version that sounds more like long-term hypothermic hibernation). Most critics seem to support some kind of future advancement suspended animation -- but that's a very different idea from cryonics from a service (and technological) perspective.
So if it is to be considered as a criticism at all (and your comment seemingly supports the notion that it is), it's not simply a criticism of the cryonics industry, but of cryonics itself.
So? Why is her opinion on the technical feasibility or personal desirability of cryonics at all relevant to her claims of organizational or technical incompetence on the part of current cryonics organizations?
Only accepting criticisms from true believers is a common cult failure mode, which I would strongly warn you against. It seems like someone on the cryonics side ...
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":