Yeah, they're pretty easy as long as you already have the outlet under the sink. The hardest part is maneuvering the drain pipe into place. Once you have it in place there's just two or three nuts you need to tighten. If you're really worried about it, you can stick a bucket under it for a couple days it to check for leaks. I'd say it's a pretty good project to get an intro to plumbing. In the worst case if you get in over your head, you can call a plumber to come in and finish it, and they'll get it done within half an hour.