If you're ever looking for product mockups using nice looking 3d device placements, then this should be on your list. Especially considering it's free, unlike many other options out there.
I can see the potential in this tool however it needs a few tweaks before it becomes something I can use. I would love to have more control on the glare such as a sliding scale rather than just 'on' or 'off' (both of which don't look realistic enough).
Keep going, it's a great idea :)