I installed it on a semi-production server runs on cPanel. Installation was damn easy. just run one command. (much easier than download it from their server )
I believe the server load is less than earlier. in my server config, php runs as fcgid. as eaccelerator seems working with fcgid, I monitored the RAM usages gone extremely high. From 500MB to 2GB and until hanging cpsrvd.
then after installing this cpanel plugin, I see overall memory usages is still in normal. mostly below 1GB.
nope, I rarely edit httpd.conf myself. so far I remember i did only once in last year.
I don't think when cpanel recompiles apache, it will screw up. because so far I have seen:
1. cpnginx plugin changes cpanel settings (tweak) and sets apache to listen to 8888. now even I recompile apache, cpanel will configure it for that port.
2. as nginx is already configured to listen 80, it will still be listening.