Diagnostic code readers

[toyotacelicagt4]

Hi all,

I'm after a general code reader that will read codes on a bmw and a vauxhall. Has anyone ever used the following reader? Will that be good enough for reading codes now and again?

http://www.ebay.co.uk/itm/Diagnosti...iagnostic_Tools_Equipment&hash=item23120c877e

Thanks