That's unfortunate but I'm sure that they will fix all of that if they want to sell this product. After all, there is a pretty big market for these given all of the Toyota/Lexus vehicles out on the road.
It's possible that the unit needs a cooling fan and or cooling fins on the housing, especially if it's installed in an enclosed area. The heat it generates might explain the performance that you experienced.
It's possible that the unit needs a cooling fan and or cooling fins on the housing, especially if it's installed in an enclosed area. The heat it generates might explain the performance that you experienced.