I like that it is easy to use, has many features for scheduling employees which makes timekeeping so much easier! It also syncs up with Quickbooks very well as far more accurate than other systems we've used in past years of using our own system internally at work - even though they have been around longer!! Not really anything specific but just all-around great product from what i understand (not tried myself yet).
Scheduling was always such an arduous task before this software came along -- now its super simple by comparison because you can set your schedule right there within minutes after entering some info into one page only.