Considering this product's low price, I was pleasantly surprised at how well built it is. Has a solid feel, not chintzy at all. Had a little trouble getting it to work on my phone lines, which I assume is because I have DSL service. I had to swap out the DSL line filters until I found one that would not corrupt the caller id signals. (Kept getting an ERROR when the phone would ring.) I took off one star because the display can be hard to read, and there's no backlight. If you get it at just the right angle, it's fine. Otherwise it has insufficient contrast. All in all though, a great little unit at a great price.