I got a cheap charging cover for my LG G4 off Ebay and tried it out today.
I think it might be my phone (which has already had one charging related fix under warranty), but..
Although the car acknowledged there was an item on the charging pad, my phone got quite warm (apparently this is normal) and started to discharge! After 15 minutes it had gone from 90% to 75%!
It could be my phone or the cheap adapter, but what are other people's experiences with the wireless charging pad in the new i30.
On a positive note, when I turned off the ignition I got a message on the 4.2" readout between the Tacho and the Speedometer saying there is an appliance on the wireless charging pad or something to that effect, so you don't leave your phone behind. Clever thinking!