Dust shroud for grinder. Anyone got one o these?

[Chalker]

Looking for a reliable way of cutting down dust when using a grinder for cutting.
have found this, not a bad price, has anyone got one?
http://www.pwm-sales.co.uk/Details_options.asp?ProductID=133

Pit has a bag , or can be used with a vacuum .

 

[Spud]

I use them they are good if you use a decent vacuum