If you're always on the move and uncertain of which places you are going to, like me, it's better to stick with Celcom, unifi mobile tends to have the worst coverage.

Yes. But unifi also uses certain LTE bands.

So far no problems with the places I'm going to.
Either at home or at work, both places are have decent coverage (full bars).
But when I travel to work or back ,which is around 50+ KM, intermittently there would be some not-spots.
not too sure about that but there was this once when I went to a rural place, Celcom had signal but not unifi, so I guess the bands are slightly different?

Please do, there really no point in getting a cheaper package if there's no coverage right?

Speedtest around Kota Kinabalu, Sabah 👍🏼