[rch]

It looks like they might claim: "object-dispatch style routing"

Maybe I'm missing something, but I don't see a substantial improvement over Flask's (or even Werkzeug's) approach.

[dkuntz2]

It also looks like it generates a lot of boilerplate stuff for you.

I personally prefer Flask's simplicity of "do as you will" over "here's an entire project for you" that lots of frameworks use.