"Absolutely excellent! Well made and designed, and incredibly useful."

Feature:
Features are great; it's brilliant! I do wish though that they had a signal pass-through jack. My biggest complaint is the lack of granularity in available metronome speeds. To my ear there's a huge difference between 72 bpm and 76 bpm, or even 96 bpm and 100 bpm. Four bpm is a huge difference, especially if you've got the metronome set to only click once or twice in a bar. However, that seems to be common among all electronic metronomes. So this complaint doesn't just apply to this particular brand or model. At least it is accurate -- unlike the worthless old wind-up type. Being able to adjust the tuner calibration up and down from A=430-449 Hz is very nice. Auto-shutoff after 3 minutes with no signal on the 1/4" input tuner is most cool as well. Plus a built-in mic when not plugged in.

Quality:
I've never had one break, and I'm brutal on my gear. What the heck are these folks doing? If it was made of metal, it'd weigh a good bit more, and I like that it's light.

Value:
A little pricier than some cheapo tuners, but value-wise, it is excellent.

Sound:
I don't know what these other reviewers are thinking. These are fantastic. The wood block sound is one of the most pleasant and tolerable available on an electronic metronome -- versus so many other (including some recommended by other reviewers) that make annoying pitched "beeps." They are not only durable and portable, but they track pitch quickly and accurately. I've recommended them to friends, who have loved them. I also strongly recommend them to all my guitar students. I have two of them. I had three, but gave one to a friend.

Support:
Never needed it.