I can' tell you how much of a time saver this is and so easy to use.
I was lazy in doing my metatags so decided it was time to clean up shop
Let's say you had the same metatags description on all your products it would take ....mmmm 5 seconds to get all your products populated. I'm doing mine by category, with a different metatag description for those. I'm switching my sizes from the description area to the model areas. Easy...place 0 for the description and it empties it and then add the size to the model area and pouff...it's done.
Every one should have this that runs Zen Cart...

And the support....GREAT. ...as it is on here too...just a little slower