Any opinions on the following CF Spoilers:

https://www.vertexracing.com/product.php?pid=829&xcSID=2ee8628c440d96684ea3a78a1e5c01df

http://scionsport.com/store/product_info.php/cPath/21_28/products_id/158?osCsid=6b27049fe966ec86c5db83767edb120e

and

eBay Listing
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=7954873928&category=33638

i have the scionsport one on mine. great product