You can also make your own slide scanner that uses your DSLR and it's quick, cheap and good!

You just need something to hold the slide at the correct distance with a good backlight, find a suitable lens that will allow you to fill the frame with the slide, and focus well, then take a picture of it.

After doing a few, you'll be surprised how quickly it goes, and how good the results can be.

Scanners are OK, but they are very slow and cumbersome, to say nothing about their expense.