Matrix MR-500 Quartz Metronome  

Keeps good time for about a couple of measures then starts to vary in time. BPM's are not consistent. In my opinion this is not a good purchase for serious musicians or students. This is not an accurate metronome. There are better products on the market. While the pricing is competitive, there is no price that can be placed on establishing bad habits.

Before you spend your money on this metronome, it does not give you the option of selecting any number of beats per min, only certain ones, about one in every three bpms, but as the tempo gets faster, even less, at a point you can only choose the tempo to be 8 beats per minute apart.  Not ideal for the serious musician, possibly okay for begginers and those who just do music for fun and as a hobby

This is a great little metronome. It lacks features that many more expensive metronomes have, like beat accents and triplets and other bells and whistles. However, these tools can commonly become a crutch. If you are looking for a tool that will keep time for you (which is different than keeping the beat) I would suggest a metronome such as this. The speaker is loud - loud enough that, at times, I wish for a volume control. It's the only thing really lacking on this piece of equipment. Other than that, I find it to be well-made and even stylish; I can put it in my gig bag and go. It's been dropped a few times, on soft and hard surfaces, and it holds up well. It's easy to see the setting you've chosen, although from a distance it would be nice to have a red line instead of a red dot. It comes with an earpiece, which I really don't use much. However, if you are so inclined, the headphone jack can also be used to connect to the return jack of an external amp, guitar or otherwise, with the help of a 1/8-1/4 converter. For a basic metronome, I don't think you can find better. You could spend more and go digital, but after a certain point, it's the same thing for more money. I love this metronome and it was definitely worth the purchase.