I had done COD with Eric for his VS + GC. The overall experience is an awesome one - he is a knowledgeable and helpful seller

I'm driving Proton Persona Elegance 2011, Manual. Those who are driving same model (PE, manual) should be able to feel the jerky when gear changing, and the slight power loss when air-cond kicks in
Once after installed VS + GC, immediately i can feel:
- Engine idling sound much quiet
- Audio sound improved - clear and crispy, and bass is a little bit more punchy... mine is original audio without any additional crossover, tweeter, amp, etc
- Improve gear change and pedal - doesn't feel much of jerk, and pedal respond is better
- Aircond kicks in won't cause my car power loss a lot. Before install, you will hear the compressor kicks in, and now is a smooth one
- I can't comment on the headlight yet, because one side of the bulb does not function, have not change yet, but i believe it is brighter now
Overall experience - car become smoother now
Worth every ringgit spend