This is a cool product; however, the author is not very good at keeping up with support. I encountered an issue where YouTube embeds throw off the grid and causes subsequent elements in the row to be exponentially smaller. Was not able to get resolution on the issue after weeks of posts and private messages.
If you’re doing any work with YouTube embeds, I wouldn’t recommend this product. If you’re looking for a neat, organized way to collage your photos this tool is great. In any case, don’t expect much in the way of support.