OPTIMAL rear brake discs

Matt197

South West Rep
I ordered front / back discs and pads thinking I was buying Brembo all around and when they arrived the rear discs are a brand I have never heard of before, OPTIMAL. On googling them its very hard to find any information, all I know is they are a German company.

Anyone know much about this brand, do you think they will be ok?
 
From eBay but I should be able to send them back at my cost, teach me not to read the listing properly.

Oh well.
 
I purchased Mtec rear discs and pad and am very happy with them. The coating is a good option (no rusty centres). Good value and fast service.