The threader on my Singer Quantum is the easiest one I've ever used. It works first time every time. It should be the standard for all machine threaders. The one on my Brother high speed straight stitch I have never figured out and have never got the thread in the needle with it. The one on my Janome Gem works only if I use Organ needles.
Speaking of Organ needles, that is the brand that comes with 99% of all new machines.