I use that all the time. I make salad dressings with it, and it's great for whipping cream. I made whipped cream the other day in less than three minutes.
I've also made milkshakes with it, mayonnaise, and I made pesto once, but it didn't work so well. I'll also use it to make salsa every so often.
Oh, of course I use it to purée soups while they're still in the pot.
What I like about it is that for things like whipped cream and vinaigrettes, salsa, mayonnaise...it's really good at doing small amounts, enough for two people and no waste.
Another item mentioned here like I use all the time is my salad spinner. I wouldn't eat salad if it had to wash it by hand, and the pre-washed kit stuff has some kind of weird-smelling preservative sprayed on it (or in the bag), so I wash it anyway to get that stink off.
I like my salad spinner so much, I just bought a mini one especially for herbs.