Cheap Brake Seal Sets

[sinto607276]

Do you guys reckon anything untoward would come of using these really cheap seal sets?

http://www.ebay.co.uk/itm/Rear-Brake-Cal...20d43eaa47

http://www.ebay.co.uk/itm/Front-Brake-Ca...2ec27d799b

I need to service the brakes, noticed one front pad has worn much faster than the rest, and the back brake is definitely binding a bit.

Same ones came up on this thread,
http://foc-u.co.uk/index.php/topic,16810.0.html

Could make interesting reading for you.