Spark Plugs

[Hillsy]

Has anyone used these BRISK plugs? Are they good, bad? Any comments? I need to do a full service on my ZX9 soon and wondering if they're worth the money.

http://cgi.ebay.com.au/BRISK-High-Performance-Spark-Plug-Kawasaki-ZX10-ZX9-ZX_W0QQitemZ280009299682QQihZ018QQcategoryZ35231QQ rdZ1QQcmdZViewItem

[Large]

Don't know if they're any good....but they don't really look any cheaper than the genuine jobbies...