If you wanna see them side by side, can goto Digital Mall in Section 14.

The first thing you will note about Zalman is the noise and air flow. Air flow is strong, yet its just silent. Cant hear anything. The bad is that, not sure why Zalman is so small in size, and why dont they extend the ventilation holes over the whole thing. The hottest spot is the GPU which is usually situated at the top but there's no ventilation holes there.

So I end up buying Notepal Infinite. Its big, suitable for home usage like Im using now. But most would be more interested in the air flow. If you turn it all the way up (level 3=max), the air flow is pretty good, though not still not as good as Zalman but the noise is noticeable. So let said you want silent operation, set it to level2, in which air flow is respectable yet not really can hear a thing when using it.

Im not sure about Zalman, but I still can feel some heat on the palm rest area lor. The notebook cooler works cooling down the bottom part but the upper part still will feel warm. Mayb slightly reduced but not eliminate. Good thing is that its easier on your hand when typing and also lift the lcd up for easier viewing.

I bought it for RM110.
I wouldnt say expensive, those selling in LYN more expensive.

bro,
the light at the back also cant see got ahbeng meh?

Infinite is cheaper than Zalman, so think carefully what you want.
Of course I demo'ed Zalman before deciding to buy Infinite.

Few things that made up my mind..

1. Base must be larger than laptop. Zalman barely covers the whole IIRC, but Infinite does it with ease.

2. Intake is from the rear side, not from bottom as most tend to be. This allowed me to put the laptop cooler on my laps/bed without worrying about overheating.

3. Weight. Its so light that like another forumer said, cheap el stock but I like it cos I do use it on my laps.

Zalman has the edge in noise, air flow and design... but I dont need all that.