I appreciate the extra flexibility of SSIS (over DTS) but my main complaint is it is very tender. Meaning, things that would have been passed over in DTS (say very changes in a source file format) seem to cause failure, which often causes extra work. Despite the extra flexibility it seems no easier to deduce what the problem might actually be.

My DBA (I am a dev really) curses its capricity, although admittedly his general nature dictates a dislike of change etc.