Re: harris, harris, and donahue?
Writer Beware hasn't gotten any complaints about this agency. However, it has been in business for several years and as far as I can tell has made no sales (new agencies that are going to be successful start making regular sales within six months to a year of starting up). There's no evidence that any of the agents have relevant professional experience, and some of the advice pieces on the website are pretty poor (for instance, the one about how agents hate books written in first person).
Another warning sign: they claim to follow the AAR's "cannon" of ethics. KA-BOOM! They say it twice, so it's not a typo.
- Victoria