I like that it syncs with my Google Calendar so all of our projects are easily accessible in one place, as well as having access via mobile devices for those times when we're not at home or using computers/laptops! Sometimes there's lag between updates but overall this has been great software since starting about 5 months ago and working out any kinks along the way (and paying support fees if needed).
We use SunSAMA primarily during business hours while everyone else works remotely; however, some features could definitely benefit from being available 24x7 - such as sending reminders before deadlines even though no one would actually check their email then anyway :p Not much dislike here really other than occasional delays updating sometimes (but only minorly enough where nothing was missed!).