Wirecutter does some good reviews, they do actual electrical testing, so they can find things like sustained draw, total output, etc. Last ones I bought that could output USB3 levels of power were RavPower, and they seem to be running really well. I have another one, Anker I think. I have found that some devices, depending on load will make some chargers whine, but it's usually low draw on the high output units. Like my dashcam and anker power plug do not play nice. If you don't already have USB-C to C or C-lightning it's worth getting some, as the newer 20w and up chargers seem to be USB-C, and it does seem that cable quality does make a difference with these higher draw devices. And to get the full 20w of fast charge, the charger needs to talk to the device. Also depends on which quickcharge standards your devices support, not much point in buying chargers that you can't use.