Get them if you have a ZP100/ZP120 and don't want to spend more than £120
These are good speakers, particuarly at the prices they go on e-bay. Considering most people will use them playing MP3s/ internet radio streamed on a fairly low kbits, these speakers do the job and complement the ZP120/100.
They look particuarly good value against the £500+ Cantons Sonos are currently selling.