Overall, I am very happy with MTailor and strongly recommend them!
I have difficulty finding a dress shirt that fits so ordered a custom made from MTailor. They do not use physical dimensions to size the shirt but rather have you take a scan/video using my iPhone and their computer program. The process works okay except the collar of the first shirt was too small which is typically the problem area for me. They offered to remake the shirt for free, I only had to pay a small fee (taxes I think). I took photos of me wearing the shirt and they provided proposed new shirt measurements. I approved most, changed 2 very little and 1 (neck size) more. They asked me to confirm the changes which I did plus they offered express shipping. As I needed the shirt for a ceremony I added express shipping which cost an additional $60 plus tax. The shirt shipped very soon after I provided my confirmation from Dhaka, Bangladesh, and I received it in 5 days. The shirt fits perfectly and it is a very well made shirt. MTailors strong points are the replacement guarantee, offering express shipping and very good communications. One recommendation I would make is to provide all the shirt dimensions generated by the scan so that the customer can provide input. Overall, I am very happy with MTailor and strongly recommend them!