AGI: Any experience with heavy usage?

I plan to make a PHP AGI to replace all my extensions.

Upon receiving a call, my script would handle the connection, billing, system messages, etc depending on the numbers being called and the user calling.

Is this not advisable? Has anyone here got some experience on heavy usage of AGI scripts?

Thing is, I’m MUCH more confortable programming in PHP AGI than messing around with tons of extension rules.

Thanks for any input,

TJ

Anyone…? Any input would be much appreciated… thanks.