Yes, I do agree that the Japanese are very polite and accommodating, but this changes when it come to H. I am not saying all the sa at H are cold, but there are a good chance you will run into them.
Last time when I was at the Shibuya Tokyu, I got really upset, so upset that when I came home, I decided to write a letter addressing the department store complaing about it. When I entered the store, the sa was showning a Japanese lady a red crocodile constance(forget the size), I was standing very far from them, and only took a look at what was being shown, then the SA ran toward me and told me in a very defensive manner, that I can't have the red constance! I was really upset, as I wasn't anywhere near them (I was at least 10 steps away), and I never asked about the bag. Overall, my experience with H isn't that good.
Oh, and if you are visiting the Midosuji Hermes, avoid an old, middle aged male SA, with grey hair, he is what I would call a rejector, whatever I said, he wait for me to finish the sentence, and said, no no no no. The female sa I met was at least kind enough to check the availability of mini evelyne for me.