Yeah, I`m not keen on that one.
  Dont like the idea of the wear on the rear tyre, chain,sprockets etc. 
 It looks crap too. 
 But the picture above (Millie on a shogun), how can they advertise it on there site, if it wont work?  
 Saw this on a US site, nice neat, compact design.  
http://www.stingertrailer.com/  And a nice UK one.  
http://www.bikelug.com/uk/  [Edited on 18-9-2005 by Bubbles]