DCP Builder works, but I dislike how controlling they are in giving out unlock keys for their free software. I never use it, but that's just me.
If your referring to Doremi CineAsset, I would stay away from it. I found it (the trial at least) to be buggy, and not worth the price tag on it. But again, that's just my opinion. The only commercial solution I found, and thought was very good was fraunhofer easyDCP Creator. Indeed it is easy to use, and encodes very fast.