I administer our RT installation at work, and it just about meets all of our needs (aside from some minor annoyances). We use it for both support tickets and for bug tracking, and aside from some initial tweaks needed to make it fit the way we work, everything's been running smoothly.
Local customizations were pretty simple once you learn how the overlay system works, and interfacing it with external code isn't too difficult either. We've got a script that scans the incoming ticket queue and associates each one with the appropriate customer account in Salesforce for the sales team (using the Salesforce SOAP API), and an RT query module for mozbot so we can grab basic ticket status via IRC.
I've never used (and until now, never heard of) OTRS, so I don't really have much to say about it. However, I notice that they use Bugzilla for their own tracking, rather than eating their own dogfood.
Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
Want more info? How to link or
or How to display code and escape characters
are good places to start.