The best thing about trillian is that it's very easy to use, even if you're not tech savvy at all! It can be quite daunting when first starting out but once familiarised with how everything works - its great!! I would say there isn't much i dislike as of yet though maybe some more features could have been added in recent years? If your looking into using this software then go ahead otherwise don’t bother because they are constantly adding new things so keep an eye open or subscribe/subscribe their newsletter which will notify them what updates need doing etc..
Using our organisation (The Royal British Legion) we've found many benefits such us being able see who has logged onto each computer from another area within my office where people aren;' t always close enough together easily allowing me quick access without having everyone come over just by logging straight away via email instead like other softwares do now days too often these emails.