Ask HN: SuSE Studio and similar apps

I recently got an invitation to beta test SuSE Studio, and after a few searches I found that there are several similar apps out there (one for Ubuntu, a few no-name ones, etc...). Basically the idea is a simple point-and-click method for creating a customized linux distro ("or appliance")

I'm waiting for it to finish building my first quick attempt before I really put some attempt into it. I was wandering if anyone here has any thoughts on the app? Have you used others before? What was your experience? I've had a goal of custom-designing my own distro for a while, and intended to do it from scratch, but if this is half decent, I might just use this.

Any thoughts or advice?