Views on these fins?

Hi,
Looking to replace my 10" Fatboy fin with an 8" fin but not sure what style.
Ive seen these on ebay and wanted to know if anyone has experienced something similar? They come with tip flex technology and could be a good value fin.
http://www.ebay.co.uk/itm/Dorsal-Surfbo ... 3cb3b70630
Cheers Jack
Looking to replace my 10" Fatboy fin with an 8" fin but not sure what style.
Ive seen these on ebay and wanted to know if anyone has experienced something similar? They come with tip flex technology and could be a good value fin.
http://www.ebay.co.uk/itm/Dorsal-Surfbo ... 3cb3b70630
Cheers Jack