A nice price for 128 Mb of storage. I bought a couple of these from Amazon given that I only ever shoot at 5Mp, so at least I can record around 100 photos (enough for the average holiday shots of the kids, etc).
I choose 2 x 128Mb sticks in preference to the single 256 Mb stick, mainly because the 256 Mb stick is more expensive than 2 x 128's (!!), and also because the single stick is actually only 220 Mb of effective storage (!!). Bizarre, but true.
As with Sony, the 128 stick has all the usual quality you expect. The only niggle with all Sony cameras (including the DCS-V1 I have) is the write + read speed onto the stick, which at times, has all the speed of a thousand geriatric turtles. Still, it's a Sony, and that's really all you need to know.