Hi barris,
I think that if you speak to most LC owners they will tell you that the infotainment system is not really that bad, its like most technology it take time to get used to it, most negative reviews are from car journalists who review the system perhaps only having the car for a day or even a few hours, i suppose it depends on how much you are going to use it, i change radio stations, and play music from a memory stick using the controls on the steering wheel, i leave my heating/cooling seats/ steering wheel on auto using the concierge system only adjusting the temperature if necessary, i have a split screen set up with heating controls on the right so if i do for some reason need to override the concierge system its just a matter of moving the pointer to the seat control and clicking the heat/cool icon, the same applies to the heated steering wheel, as for the sat nav i rarely use it, but when i have ,just putting in the post code has always got me to my destination.