The Qwik Time QT3 digital metronome is the best selling metronome in the world.
Qwik time has all the features at a great price.
To be an artist one must be able to play in perfect time slow, fast or anywhere between. Then one must be able to leave the time at will. This is not the same as having the time leave the player, and that is the effect if one is not able to play with the metronome.