Pros and cons of using your own child theme with Upfront

The question is about UpFront, not Scribe, but I couldn't find UpFront in the drop-down menu.

While the child themes offered are not bad, I would like to know what if I just use my own, simple, child theme. Something like:

/*
Theme Name: New Child Theme
Description: My description
Version: 0.1
Template: upfront
*/
@import url(../upfront/style.css);

I would especially be interested in what are the cons, what issues could I get into. Of course, I wouldn't mind finding some pros about this as well.

Also, hope that this would be considered an open question to all WPMU users, and not a support ticket.

Thank you all.

Best,
Mario