Does your laptop have a bottom fan intake/intakes ? If it does, you should get an idea where the intakes are, and get a cooler that has a fan installed blowing upwards at exactly those intake locations. That is the best way to decide on an effective laptop cooler.
That one has a lip to tilt the laptop up on a solid surface. Might not be very comfortable on your lap. Check this one, good reviews and not too expensive.