Here's what I can tell you. If you are a bride this is the place to go to find your undergarments. I used to work for La Vie en Rose and we always had to refer brides to this store to find what they were looking for because we only carried 1 option in bridal corsets...
Yes, the bras can be more expensive but you get what you pay for. (Hate to say it but if you buy a bra from La Senza you are not getting good quality or good service. Their staff does not know how to fit a bra properly, nor do they care)
Bra fittings are so important and I had no idea until recently. Like I said I worked in Lingerie and I have been wearing the wrong size for years. I was told I was a 36-B but really I am a 30-D!
I don't find the ladies there rude at all. They do try and let you have your own space so it doesn't feel like pressure sales but if you tell them what you are looking for they will give you a hand. You should ask for Karen, she is the best and so super sweet!