My favorite artifact is:

The Apple (Original) iPad is the artifact I chose because it really evokes my saying, "I LOVE this thing."  It is intuitive and easy to use.  I love the clarity of the retina screen. It is beautifully designed, yet not ostentatiously so. Since it was the first Apple product I ever bought, I wondered if I could use it effectively, but the learning curve was very quick.  It really is intuitive, even if they do run classes to teach you how to use the features.  Also, it serves to replace several other artifacts in my house-- radio, tv, laptop computer, etc.