XtremeComputing posted a review on the Crucial 1 gig DDR2 PC2-4200 Laptop SODIMM

Go through the Crucial memory advisor, take the price of the 1 gig set for your laptop add it to your laptop cost, then go find a laptop with same specs as yours and 1 gig of ram.. You will find that 96% of the time there is a saving to be made.

Crucial 1 gig DDR2 PC2-4200 Laptop SODIMM Review