再问下租车保险问题

我在priceline上拍的AVIS的车，网站推荐了一个保险，实在没看懂啊，大家帮我看看买这个保险实惠不？和AVIS的保险哪个是一样的？

多谢！

Add Collision Damage Insurance for $11.00 Per Day*
Offer expires: 01/17/12 at 02 AM EST
• $35,000 Physical Damage Coverage on your rental car for collision, theft, vandalism and much more.
• Primary Coverage means you receive coverage without first having to claim payment from your auto insurer, as you do under the secondary coverage offered by most credit card plans.
View Collision Damage Insurance Description of Coverage


AVIS公司的保险项目：
Loss Damage Waiver (LDW) services
Personal Accident Insurance (PAI) services
Personal Effects Protection (PEP) services
Additional Liability Insurance (ALI) services
Roadside SafetyNet (RSN) services