I just got mine last week (2024 Carbon Edition). The first couple times I used the charger, my phone (iPhone 15 Pro) warned me about excessive heat within about 10 minutes of me putting it on the pad. Did a little research, read about how inaccurate placement causes less efficient charging with a side effect of ....more heat. Curse you, science. The next day I started placing my phone more carefully, and specifically slightly to the driver's side of center in the charger, which lines up the charging coil in the phone more closely with the coil in the car. Longest I've driven since is just over an hour, and with better phone placement I have had 0 issued with overheating.