Sarah A is partly correct about La Senza being the Canadian Victoria's Secret. It is owned by Limited Brands which also owns Victoria's Secret! But for some reason, I like La Senza better.
Whilst Victoria Secret (to me) has a bit of a trashier image (sexy, but trashy), La Senza comes off as being more playful sexy. There are tons of bright colors and fun designs that make shopping for lacy danties a fair bit of fun.
I also think that their prices are quite reasonable. They aren't as expensive as some of the luxury brands but they aren't the cheapos either. They are that nice middle ground where you feel like you're getting a deal for quality goods.
The day I stopped by here they were having a massive sale and the place was PACKED! Staff was handling it quite well and they were keeping the lines moving and helping people find what they were looking for.
I won't tell you what I bought *wink, wink* but I'm glad I happened upon this shop as its something that I miss here in the US!