Yeh that company is apparently good too. I've never seen their work but some Arnold Clark branches use them to fit leather interiors into their cars for customers. Going by the finish of the seats from Transcal though i'd defo stick with them. They keep you up-to-date during the whole process aswell.
Also the guys that do the seats are from Singapore and LOVE chocolate and Coca-Cola. Use that as bribery lol.