I got mine today and ran extensive charging speed tests using the Ampere app on my Pixel 3.
I used direct plug into the usb, usb with splitter, usb Qi 3.0 capable 12v aux, and Qi 3.0 capable battery pack. I tested the official Tesla model, the Taptes model, and the Jeda 2.0 model. I found that the draw was almost identical among all of the units. The max 640ma on the aux but most could get around 600ma and all of them would very up and down during the charge. I found that none of them charged particularly fast, which is a shame. The Tesla has a very rubbery thick pad similar to the Jeda, but maybe a little more premium. I plan on keeping the Tesla model and selling the other two. I didn't have the Nomad to compare, so if someone has it, check using an app and maybe that would complete the testing. One difference in the Tesla, is that it comes with a new shiny black lip. It has a small overhang that the the phone slightly slips under. This can keep it from bumping up and falling into the console. The Tesla does not have a horizontal charger, so if you really need it, go with the Jeda. I think the Tesla does have a larger charging spot, so it is easier to start charging by just dropping it into the plate.
My pick is the Tesla, but if you want cheaper, the Taptes charges around the same rate.
Todd in Torrance