Unfortunately, Perfect Drums is, effectively, primarily for the 'Metal', and people wishing to use it for other musical genres may very feel frustrated when using this software. Consequently, all the supplied snare samples, all apparently with snare spring removed, sound very much the same as each other (like biscuit tins), as do the toms (all very clicky, with no tonal depth), the kick drums (also very clicky with no tonal depth), and the cymbals, which all sound thin and dark. Of course, you could add your own samples via the Sample Player section, but even doing this can take many hours of setting up, as well as learning how to do it properly.
As someone who dislikes the 'Metal' genre, and after devoting far too much time of my limited lifespan with 'Perfect Drums', I went back to Ezdrummer and Superior Drummer which has, at least, offers a wider variety of components and sounds, as well as a higher standard of audio fidelity. It was after returning to EZdrummer that I realised 'Perfect Drums' was making my mixes muddy.
Yes, they sound good, but the genre they sound good on is pretty limited, so comparing them to EZ and SD is not really a correct thing to do. Only a porportion of SD and EZ is in the same area. With SD and EZ you get a far more sophisticted and deeper drum software, especially if you rely on pre made grooves. When it comes to sound Perfect D sound good, but IMHO SD sound AS good, so there is really no need to buy Perfect Drums in addition. I would then rather go for one of SD expansions. But if you only stay within the heavier part of rock music, and are able to play drums and full grooves on your keyboard/drum pad, then you might look into this one. I would however like to mention that when it comes to sound the EastWest drum software is hard to beat, however this is also more limited than EZ and SD. So if your are NOT a drummer, and need "help" building a credible groove, I still think EZ would be the best choise, especially cost wise.