themes any good?

hi guys, i am planning to add themes to my wpmu network. The themes are pretty well made and they have over 300 themes, and they are constantly updated as well.The only drawback is there are 4 links of in the footer which cant be removed (which are do follow) because they are under the creative common license.

Has anyone else implemented these themes in there wp network. What are your suggestions. Do you think it is a good idea?