Art Matthews, a fellow OTI social network friend, has blogged extensively about his experience with three e-clinics. Be sure to read his blog posts here at the network. Thanks Art for sharing your experience!
Well I was planning to go this route as way to "dip my toe" in the pool of online therapy, so to speak. I want to get a feel for the experience before establishing my own practice. Art's experience confirmed this for me. He seemed to have learned a lot that served as a guide for him. Like you and Art have suggested, we must conduct thorough research before joining an e-clinic.
From what I have seen of many e therapy infrastructures, many have paid little attention to usability, not to mention client centric design. Many also appear to simply replicate existing f2f structures without giving thought to the broad potentials of this burgeoning field.
I have yet to see an e clinic I would wish to join myself.