Had a similar thing when my son was overdue; did the trick and I started labour a couple of hours later. Not very pleasant though; can't see why you'd pay to have something like that done.
Colonic Irrigation is just a posh name for an enema. You can buy enema kits at most chemists and use them in the privacy of your own home.No need to pay hundreds of pounds for the 'pleasure' of having to sit on a toilet in a strange place making horrible toilet noises.lol