This brush fits directly onto my excellent
Dyson DC24 Allfloors without any need for the adaptors and is a very good additional tool for it.
The bristles are probably not as soft as you'd think but this makes it more effective at cleaning and dusting, however I would hesitate to clean inside my PC with it like another reviewer mentioned (if only for electro-static reasons).
It really is effective at cleaning shelves, mantelpieces, modern TV stands, and just about any surface you care to mention, often without having to move the objects resting (Jaun Sebastian) thereon. I can give my 3 bed house and all it's surfaces a decent going over in less than an hour (including the floors vacuuming normally) with this attached, it really does make a big difference.
All in all, it's a well designed and useful tool that adds a lot of functionality to your Dyson and is to be highly recommended.