This is a general question on your experiences with RACLs at the network edge.
How does this affect router resources in general?
Any particular issue when run on eBGP peer devices?
Thank you for sharing your experiences.
Use CBAC instead, this will help with such applications as passive ftp.
Both RACL and CBAC have performance hits. How much depends on your platform, size of ACL, amount of traffic, etc.
Hope that helps.