I actually have this one and I do not have a problem with it. It boils water fine for me. I guess I'm not in a rush. It really helps in a pinch if your somewhere and don't want to eat out and don't have a kitchen in your hotel room.
I have had a nuwave induction cooker for 8 years and has low, med-low, med, med high, high and sear. It works wonderful for all these years and it does not take it a 1/2hr to boil water. You need to get a better brand name on to compare the temu one against and I will bet you find the brand name one works better.