What can go wrong when flashing an unstable Android OS onto a phone? Is there an easy way to reset the phone if something goes wrong? Has anyone out there had experience flashing Android OS?

In your opinion, should anyone flash Gingerbread 2.3.3 aka Leaky onto their Samsung Epic 4G?

One benefit that I can see is that users of the Epic will be able to test their applications on > Froyo 2.2.1, which is currently the stable release for the phone.