Well, first of all, it’s part of OTP so I prefer this over the others (as long as it fits my needs). I find it pretty simple to use, but there should be some upgrades for sure.
I’d like to point this out: Httpd connection header bug
This got me into troubles sometimes, especially with “connection” header. I’d like to contribute to this, but I’d need some more experienced Erlangers to guide me.
Solution could be that header value is either string or list of strings. But that also implies some changes on the whole app. What do you think? 