Sleeveless sanding drums - good tool?

For example -http://ift.tt/1L9cVq4



Are these any better than the usual drill press style sanding drums?



I like that I can use sheet abrasives - the typical drum kits have always been less than satisfactory.



Can anyone give a good review? Any restrictions/qualifiers?



Thanks for any and all comments.

(e7)

Sleeveless sanding drums - good tool?