it doesn't have tempo-sync.
The only problem with the pad is; you are "stuck" with the tempo of your samples.
The spd sx had this feature, but for some reason Roland decided to not include it in the -pro version.
Other than that, this is a beauty!
Easy and comfortable to use, plenty of storage, easy editing, and an intuitive app that visually explains what is happening.
I recomend it and pray to every deity that tempo-sync is added in a future update.