WarrantyDirect has the most pristine record of all the 3rd party companies but comparing their rate with the Lexus 7yr/100k. It's not better in fact it looks worse.
Term/Miles* Will expire on... Or when odometer reaches... $0 $50 $100 $200
4 Years / 60,000 Miles 9/28/2009 60,000 Miles $1,762 $1,627 $1,517 $1,436
4 Years / 75,000 Miles 9/28/2009 75,000 Miles $2,112 $1,947 $1,812 $1,672
4 Years / 100,000 Miles 9/28/2009 100,000 Miles $2,351 $2,191 $2,026 $1,831
5 Years / 60,000 Miles 9/28/2010 60,000 Miles $1,811 $1,676 $1,566 $1,468
5 Years / 75,000 Miles 9/28/2010 75,000 Miles $2,171 $2,006 $1,871 $1,726
5 Years / 100,000 Miles 9/28/2010 100,000 Miles $2,421 $2,261 $2,096 $1,902