I have the older one FAB used to sell, 4dbi (looks almost the same, I think it was made by MaxRad), and I like it. It's a huge improvement over the built-in Orinoco antenna.
I was sitting downtown in this little courtyard with one side and overhead blocked by a building and picked up 1 AP. I plugged in the blade antenna and another 6 APs showed up.
I pulled off the double-sided tape and put some stick-on Velcro so I can stick it on my laptop or the side of my bag or wherever.
On the other hand I went walking yesterday using a 14dbi panal antenna that FAB used to sell and got great results
