I like that it allows me to see exactly what's going wrong with my website without having access or knowledge of code (which can be very difficult).
It also makes reporting bugs much easier than emailing them directly from within Chrome Developer Tools! The only thing about this program i dislike are some parts where you have an option between "yes"/"no", but there isn't any explanation as why one answer might work better over another - so if someone else in your team uses debugme they may not