I am Julia Rhodes, principal colon hydro therapist with West London Colonics.
WLC Wahanda page: http://www.wahanda.com/place/west-london-colonics/
Basic criteria to assess the quality of a colon hydro therapist begins with:
a) Initial point of contact with the prospective client (i.e. how the therapist came to the client’s notice). This could via marketing literature (pamphlets and business cards) or the ubiquitous Group on, Watcher or similar. Best from the point of view of both therapist and client is WoM (Word of mouth from a trusted source). In todays web driven marketplace, web searches are increasingly the preferred search method for sourcing services. First impressions count. There is not a second chance to make a first impression.
The way a person carries out their business - Do ads, websites and the like convey professionalism ?
b) Regulatory compliance: Professional qualifications, insurance and affiliation to regulatory bodies.
Another guideline is how complete an intake (or initial health) interview is. If this is perfunctory, they have no idea of a client’s needs or restrictions, a bad sign.
c) A focus on Communication and client education. Understanding the client’s problems and being able to devise a treatment plan that addresses them shows competency in their skill set, provided that the plan is flexible and empathetic to what the client is able and prepared to do (not what they are not!)
A good colon hydro therapist can help you get you the result or outcome you're looking for (provided you also play your part), quickly and effectively. But not superficially. In colon hydrotherapy its useful to go slow to go fast.
e). Experience: a therapist needs experience to understand not just the needs and wants, but the fuller expectations of the client.
f) Quality of interactions: Can you speak to the therapist on the phone, get questions answered etc. Response times for emails and returned calls, plus the content of the response you get will all give you an indication of what sort of person you are dealing with and whether they are a full time therapist.
After you have weighed up these sorts of things, the best advice is to go with the one that feels right, (someone you find easy to talk to, or who you feel has been straightforward and honest)
So in short, do the background checks and research, and then go with your gut feelings.
See also my comments under 'Veliles' answer .