Any experience on these cheapo alloy racing radiators?

Hi folks,

does anybody have any experience with these china 2 row racing radiators floating around the internet and on ebay? I am at the moment rebuilding a US Rabbit GTI and the 30 year old rad which is in there should probably go for a new one and i am also considering to put an 1.8t engine later this year with a/c so a bigger radiator would be very useful i think.
Any experience at all would be much appreciated!

Thx
Sokratis