This is a young person's anime (say 10 or 11) and I didn't watch all of the CD. Its probably OK as a child's (girl's) anime - and I wouldn't mark it down because I bought the wrong video. Simple plot, simple characters and motivations but quite well done.
The story is slightly connected to XxxHolic but, despite a few shared characters (mainly the Mokona) is for a younger audience than XxxHolic and it lacks the style, darkness and quality of artwork (although the artwork is OK for its intended audience). The link between the two stories is unimportant.
Some children's animes can be entertaining for adults but this isn't one of them. This one's for children only.