I had 5 items altered here - 3 pants, a jean, and a legging with side zipper. All were quite expensive, designer pieces (from Ann D, Junya, Yohji, and Toteme) and all did not turn out well (like, not wearable anymore). Some pretty basic stuff, like understanding how to re-attach a zipper to stretch fabric, was missing from their tailors skillsets', so I ended up getting ripples and curves around my zippered seam from the tailor pulling and stretching the fabric /a lot/ as they attached the zipper. There were butchered cuffs too, and waists that were much looser than agreed on because the person safety pinning me at my appointment didn't want to re-do the pin, and "made a note" to use some markings they made instead, which the tailor didn't see/adhere to.