I've been to multiple AKJ smaagams ...
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/new-to-sikhism/20852-akhand-kirtani-jatha.html
it's a fun time, and you'll probably love how involved the entire congregation is. I would definitely recommend going to see what its like and to experience it for yourself.
Reference:: Sikh Philosophy Network http://www.sikhphilosophy.net/showthread.php?t=20852
As per AKJ overall, you can read about them, and their policies and be your own judge.
My opinion, smaagams are fun and involving, but AKJ is far too out there for me.