I usually frequent the main Celine store in Japan located in the Omotesando area of Tokyo.
Even if it's on a busy Saturday or Sunday afternoon in the streets of Harajuku/Omotesando/Aoyama with people packing the streets, the Celine store is usually quiet. As expected of Japanese customer service, all of the SAs are very helpful, professional, and very friendly. They are not pushy and you can take your time. If you can speak Japanese, it's a big plus because you can have interesting conversations with them.
Being a guy who goes into a women's clothing store, is a frequent visitor, AND is a foreigner (non-Japanese), I always attract extra attention and I'm always shown around the store by the same SA who has helped me with previous purchases.
I usually don't call them up because anything I want to see, it's usually there.
Hearing other people's stories about shopping in Europe and the USA, I'm glad I don't have to fight large crowds to get the rare models and colorways, deal with rude SAs, and compromise with something I half-wanted. But I'm not glad of the higher prices