I was using XBcopy for a long time and eventually switched to PX HDD Loader; now I'm back to the square one with DVD2Xbox. I'll be honest, the interface isn't as aesthetically pleasing as HDD Loader, but I still think it's a better program. It uses the default.xbe to name the folder (i.e., it would allow me to store 007AUF in F:\Games\AgentUnderFire instead of in F:\HDDLoader\Game11). Saves me an extra step. It also patches the media checks on the fly and decodes DVD-Video volumes to the HDD; whenever XBMP supports it, DVD2Xbox will be the way to go to store full DVDs with extras.
Also, I've mentioned many times before that DVD2Xbox is by FAR a better diagnostic tool. If you've backed up a game with PX HDD Loader a few times and it's freezing or won't boot, HDD Loader may have experienced a read error...and never even let you know about it. It still indicates the backup was successful. DVD2Xbox will return an error saying it couldn't read a file, so you can know 100% that the backup was successful.