I would like to suggest the multiple upload with ZIP files, because contrary to what is said in the documentation, when you are browsing your pc folder, you can NOT select more than one file to upload. Besides, generally, the way to add images to a category it's not completely intuitive, but I think that in the future it will become easier.
It has a lot of parameter! Really! But you can't do without any one of it! Everyone is worth, because they let you manage the gallery at various levels.
Besides, this extension updates itself with a simple click on a link in the backend! Amazing!!! I would like that Joomla core had a link like that to update so quickly!
I know that i'm forgetting something else great that I note about it.
Great developer. Thanks for it.