I must admit, when I was trying to teach myself piano/keyboards I used a metronome. The drum loop was somewhat distracting plus the metronome just seemed to remind me of my school band director with his baton. Haven't had it out in many, many years though. Now it's so much better using the drum loops or bass loops. (Actually prefer the bass backing tracks).
But, to each his or her own! What works to make music better is the right answer.