The strap is of good quality and is very comfortable to wear. Unfortunately, the connectors of the strap did not fit my Apple Watch Ultra 2. This is a known problem and also happens with other manufacturers of high-quality leather straps for the Apple Watch. What I didn't like was that customer support told me to send the band back and the connectors would then be replaced. This would only really work if my Apple Watch was also on site. Elsewhere, you simply get the connectors sent to you and can choose the right ones.
Regarding the color of the strap: in my case, the color deviation of the mustard color is very strong. There is no yellow tint, it is more of a light brown - like the sand version in the online store. When I asked whether it might have been mixed up, customer support told me that there would not be a big color difference between the sand and mustard colors, referred to the terms and conditions (color differences due to tanning) and told me that it would still darken. This was all friendly, but rather unsatisfactory. The support team didn't ask for a photo of the strap, for example.
In the end, I have now replaced the connectors myself with matching ones and am getting used to the color.