I would totally recommend this one to anyone who wants to get a white scrap-pen.
I took a chance and got two at once, and I don't regret it the least! It's so easy to write with and it doesn't smudge. It has a liiiittle drying time that you need to take into account, so that you don't smudge it yourself or anything, but it's a real quick time so it doesn't bother me.
Also, you might want to doodle a bit on a piece of paper other than your lo before writing with it on your actual lo if you don't store it vertically tip down. I store it lying and that can cause the color in the pen to retract a bit from the tip. But as long as you're aware of that if you don't store it standing up, this is a totally awesome product! :)
This is a fabulous white pen. I have tried many different brands of white pens and have been terribly disappointed in each one (see my review of the AC Galaxy Writer). This pen is smooth, bright and reliable. I love that you can use it to write on different surfaces, including slick ones such as photos and wrapping paper and that the ink shows up immediately and dries quickly without smearing.
On occasion I have had a little trouble with the ink starting to flow as soon as I start to write and once in a while I will get some hesitation from the ink flow but overall, this is a GREAT pen. I recommend it to all my friends and have even bought some for gifts.
I have to say that I don't have much to add to what others have said about this product. I did read the reviews in my search for a white pen to use in my scrapbooks and this one appeared to be the top favorite by a landslide. I can see why, as it is smooth flowing and has a very nice opaque quality to the white - not weak and "watered down". You don't have to double back over your lines. They are solid and boldly white when you lay down your initial pen stroke, therefore this shows up on most any color paper you use. This was out of stock numerous times when I tried to order, so if you see it is available you better snap it up!