I'm not sure if this one has a bigger sweet spot, or if maybe the round shape of the pad is helping, but every time I place the phone on the charger, it connects and instantly starts charging

I place my phone on other Qi chargers, I typically have to hunt around a bit to find the "sweet spot" where it will actually start to charge

If you are not in the right spot, you simply don't charge (and on other vendor's products, there typically is no notification from the pad that you are not charging

I don't really know if the pad has turned its charging circuits off, or if it has switched over to a trickle mode, or if the lights are just informing me it is placed on the pad in the proper spot