hi, i havent used aspectj in many years so im outdated and probably a bit biased, but... aspectj is a more popular implementation, its older, it got a larger userbase and it got a few features jboss doesnt have (but we're catching up :). the reason i started to use jboss aop was because i just felt that the aspectj syntax was awkward, and when i looked at jboss aop, its syntax where more intuitive. ive seen that the aspectj syntax has "improved" now, but i havent had the time to test it yet. the most important thing is to understand the aop theory. how, why and where to use it, not which implementation you use. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3991580#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...