I like that it integrates with many of our existing systems, so we can see historical data to help us understand where problems are occuring across those platforms in real time as well! It's not very intuitive for new users at this point (it took me several hours just getting started).
There seems little value added over other APMs out there - but maybe they're working hard behind-the scenes? We needed something fast which could do more than basic monitoring/metrics reporting without having dedicated team members focused only on doing one thing really effectively or spending too much money up front since most companies don't have enough resources right now anyway.