I don't have any issues with the stock wipers, yet I intend to apply Rain Kleer or Rain-X as soon as I can get my hands on some. Apart from very low speeds, this treatment means you don't even have to use wiper blades. The rain will "pellet" on the screen, rather than flowing flat, and it is easy to look through the droplets, especially at speeds over ~40 km/h.
You can make this yourself
Homemade Windshield Water Repellent | eHow
or you can try to find it in shops (good luck in Hong Kong!). I know for sure it is available in Japan. Only downside is I don't understand Japanese, and when I bought something there last week it turned out to be glass cleaner, rather than rain repellant.
I have used this solution on my cars since around 1995, with great results. It needs re-application every 2-3 months, and the less you use wipers or wash your car, the longer it lasts.