I have the original Luxlink and tbh it is a bit buggy, does the ocassional strange thing and every now and then dont work at all. Ive learnt to live with it so im ok, if I lived in the states I would probs get the latest one but its alot of hassle importing, taxes, and then refitting it again etc.
Ive heard the new one is much more stable and has the additional feature of controlling the back windows. Anyway im sure you will be very happy with the latest one, its a very cool mod :)