DSF Acoustic Drums Expansion Pack For Session Drummer 3?

I haven't upgraded yet to X1....I'm using 8.5.3 and most of the time I use Superior Drummer 2.2.2 for my drum sounds.
Has anyone listened to the DSF expansion packs for Session Drummer 3?
Also, is there any overlap in these sounds with what was included already with Sonar 8.5.3
I'm interesed in the acoustic kits...wish I could audition them
Thanks

Hm. February. A bit of a late reply, but here it goes:
I find these drums to be an asset, and I use them often. I felt a bit restrained with the kits included with SD3, both acoustic and electronic, so I opted for more. There wasn't a massive amount of kits, but realistically there was more than enough. I think the sounds are rather good most of the time; well sampled, usually you can find just the sound you want with a little tweaking from the PX-64 percussion strip. All in all, there's nothing especially significant about these; they're just more kits, albeit good ones, but if you want to expand your toolset then I think this isn't a bad buy. Also the benefit of using them in SD3 is a must for me. I love that synth.
And no, they don't overlap with what you have. They are all 100% new.