Metranome is a musician gadgets,if you're planning to record,practice with tapping at your home without going in the studio you can get the right tempo of this cool device.It is a device that most musician buy for their own convenient and the outcome is,WOW!
What I know about this, well my friend is the one who explain to me while I'm writing this post. Proper research and recommendation is another way of buying stuff. For me whatever you choose it doesn't matter as long as you are happy and it works for you.
Having a musician friend is plus knowing this cool gadgets.