I thought I would share my experience as this seems to be a subject of interest.
I decided to get a suit made while in Ao Nang, I walked into the usual spots offering $150 suits. While we were discussing prices, i watched someone having a suit fitting, i though for a fitting, the suit was completely too big and had to many adjustment to be made, in fact it was as if they did not even measure the person before it was made!
I then made my exit and decided to try Tom Tailor as he was the only one not standing outside fishing for work.
Once i walked in, the tiled floors, air con, fancy shop i knew prices would be high.
After haggling, i agreed (without researching) to a suit and two trousers made with material from the back of the room. his so called finest range. Mind you, I bought a super wool 160 and super wool 130 for more money than other claimed superwool 180+.
i had four suit fittings over 5 days, fist was a pure canvas to determine length. Other were to pinch here and there. for trousers, I had about 3 fittings on one and it was used as a template for the other three
*PRICE*: i was definately ripped off. but that is due to my very poor haggling skils, no research AND starting the process by saying "i want you best material"
trousers about 2,500 baht. all in for three trousers and one jacket was 22,000 baht . tikes
*Fitting*: it fits very well due to the numerous fittings with the actual taylor who made the suit (i never met the one who made the trousers)
*Fabric*: I compared it to fabrics available at a London Taylor and they measure up very well
*Durability*: This is were i am let down. 6 months or ownership and wearing one trouser for a few weeks on end the seems one one part of the legs a coming loose. the others are fine although used mildly
Final point: don't expect a Saville Row suit. they are NOT bespoke but rather closer to having a good off the rack suit tailored to your body. you can read about suit canvassing elsewhere, these are NOT canvasses but glued (as as hugo boss suits etc)
On my last day, i found a tailor in the shopping mall that joined the Continental Hotel, they said a top suit costs about 9,000-10,000 bath and insists on 3-4 days as they want to ensure it fits. i will use them next as they seem to have pride in their work and i say a few examples that seemed fantastic.