I strongly prefer the HKS speedloaders, video here:
http://www.youtube.com/watch?v=7Mt2L8ysoZ0
$16, and you can load without resting on a bench/table.
I gave my UPLULA to my brother. It works fine (as long as you have a table/bench to rest on), the HKS is just easier to use and more versatile (and half the price).