As a potential Chet girl, I thought I'd give my 2 cents.
The only thing I don't like (or maybe not looking forward to) is the required stay @ the 'partner hotels'. As someone mentioned earlier, wherein the 'discount'? I believe we are still charged the usual rate but 'forced' to stay for 20 odd days.
OF course i see the benefit of doing so, and nurses visiting you etc etc but seriously, I think we should be allowed to decide on the place to stay. Some people may have accommodation already (I wonder if the Thais who did it with Chett are subject to this requirement too?). Of course again when I say allowed to decide, it should be reasonably near to the clinic, e.g., in the Onnut area etc.
Apart from that, I'm really looking forward to everything and I chose Chettawut too, because of the value for money and the results. I think he is one of the top and yet his charges are still reasonable (for now!).