I used it to create a floor plan of my house. It works well. However, user beware. While the app and MagicPlan account (required if you want to "scan" more than 3 rooms) are free, receiving a copy of your created floor plan is NOT free. The prices are fairly reasonable, but it's not clear that they charge you for each plan you create until after you've already created your plan.
I chose, instead, to use the free heavily watermarked PDF copy they do allow you to have, then removed the watermarks with Adobe Illustrator.