I would absolutely recommend Timmy's after purchasing 6 suits for a wedding, 4 pairs of extra pants, lots of shirts as well as Sun dresses and women's work clothes.
We visited Timmy after reading trip advisor reviews and after our experience with Timmy and his helpful colleague Ash we would absolutely purchase more from them next time we are in Samui.
Timmy did not hassle us on the street like all the other tailors in Samui and he did not haggle on price, so it was already reasonable you didn't have to fight him down from a ridiculously high amount, which is great as it can get very exhausting with all the haggling and sometimes you really don't know if you got a good deal or not, at this store you will.
Out of all the clothes we purchased some of them needed several fittings to get perfect but we left with everything just the way we imagined they should be. We visited about 6 months ago now and all the clothes have worn and washed well and are still of very high quality.
The one thing that was most impressive for us was that when we returned home from Thailand Timmy helped us with an issue with Fedex losing some parcels we sent home unrelated to Timmy. Since we couldn't speak Thai and didn't know anyone in Thailand we asked Timmy for help and he sorted it out for us which was pretty amazing as we had only met to buy clothes from him and he had no reason to help us.
Really nice to have met such genuine people on our holiday.
This review is the subjective opinion of a TripAdvisor member and not of TripAdvisor LLC.