Well, depends. I certainly would never recommend it for compiled apps. It doesn't understand the concept of building an app and nor does it understand the difference between all and any. So, with the former, if you're uploading a compiled app to free using it, you're only able to upload the binary.

Also, I'm sure I'm not alone in disliking the rules and control files generated by it. People should just learn to use Debian's packaging tools. God knows there's enough guides on how to use them.