Floor sanding machine

[Froggy]

A friend is wanting to buy a floor sanding machine but would like some recommendations for the brand as he, and I, have no idea. Any suggestions please?

 

[niagra]

Bona. Needs to be a belt sander and not drum, as it is difficult to lower the drum without gouging it.

 

[Froggy]

Thanks Niagra, that's a useful bit of info.