I ended up going to William Cheng & Son for my suit. I did not try Sam's Tailor.

I made an appointment when they opened on Wednesday (10:00a), came back same day at 4:00p for my first fit check. Then I returned for a fitment at 12:00 noon on Saturday and picked up the final product at 6:00p. So a 4 day window was enough to get the job done.

I was pleased with the experience. WC & Son were very professional, and definitely didn't give me a sales pitch. They were low pressure and had a lot of fabric samples and example suits on the rack to show me the options. If I had a complaint it would be that they didn't always offer me options that I had to ask about (like higher quality fabrics, pocket options, etc). But I also am not too familiar with the process so if you know what you want, I'm sure they would be fantastic. If you don't, they will more likely to revert to some standard rather than go through every option. Not necessarily a bad thing, just an observation.

They seem to specialize in shirts, but had lots of suits going out the door while I was there. The suit pricing seems quite good. I got a 2-button suit with Italian wool (Vitale Barbaris Canonico) for 4200 HKD, plus 300 HKD for a premium liner material. They had cheaper options for 3200 HKD and highest-end Italian wool (Zenga) was 7200 HKD. I also bought one shirt in standard fabric for 350 HKD and two premium fabric shirts for 450 HKD each.

I am a newbie to tailoring, but I would recommend WC and Son. 4 days is definitely a tight turnaround and after I got the suit home I have some ideas of what I would do differently next time. But overall, a great experience and a good value. Hope this review helps others.