Amazon sells this product for as low as $16. Watch for their dynamic pricing. There are $2-5 price swings on this product.
That being said, it's *worth every penny.* Hanging most pictures is easier than ever before. Virtually perfect placement every time, with only the occasional 1-5 *millimeter* offset. This usually happens because the hook you are using and the hanging tool have different shapes and so hold the picture's hanging mechanism (wire, dring, sawtooth, etc) slightly different.
The tool feels flimsy (it's extremely light) but it can hold large heavy pictures on the double hook.
You should know that many pictures have two D-rings, which makes hanging more difficult as this tool will only hold one of them. However, that doesn't mean the tool isn't useful. Simply use the hang-and-level on one d-ring and hold picture level with your other hand. Adjust accordingly and then remove the picture and mark one D-ring spot. Install your hook and hang one side on the D-ring and the other side on the Hang-and-level. Adjust for level again, remove the picture and press the marking button! Perfect!
If you're going to hang heavy pictures, it's *very* useful to have someone help you. Holding the tool with one hand and adjusting with the other is difficult as your arms will tire easily.
If you've ever wanted to hang pictures and hate geometry, measuring distances and finding out you're still wrong, this tool is AMAZING.