I am already Pokemon Platinum's strongest warrior, but this hack brought Sinnoh to the next level. It has a wonderfully wide selection of pokemon to catch, much more challenging and deliberately designed bosses, and the additional content as well as the optional patches to buff weaker pokemon and increase the game speed really helped this hack create its own identity separate from vanilla Sinnoh.
My only complaints are that the start and end of the game have some unnecessary level jumps (which I found especially annoying in the early-game since you don't unlock the Blissey training room until the mid-game) and sometimes fourth wall breaks from NPCs really took me out of the game and made me groan a bit.
I strongly recommend this excellent game to any Pokemon fans who aren't afraid of a little challenge.