I've been really impressed with the ease and look of this free plugin. They keep updating it so it's getting better all the time.
I wish they would add an option for a second column and a way to add a row a images next to each other. Another thing is that oftentimes, when I select a post to insert the program inserts an entirely different post. Annoying! Also, it's SO . . . Slow. They say that will be fixed in the visual editor rollout. I'm crossing my fingers.
If they fix these bugs, I'll definitely upgrade to a paid version.