This worked out extremely well for me as I only have AD1 from a previous version of SONAR.
 
I mainly play and record metal, but with Superior Drummer and a few packs I'm fairly well covered for that genre in both drums and MIDI, so I decided to indulge a few other styles in my choices:
 
ADPAK:

1. Studio Rock
2. Indie
3. Fairfax Vol 1

KITPIECES:

1. Ludwig Supraphonic 402 Snare
2. Premier Gen-X Bass Drum
3. Sonor Designer Snare

MIDIPAK:

1. Reggae
2. Punk Rock
3. Blues

 
Pretty eclectic selection, don't you think
 
 

Does anyone know if the perc beats midipak is different than the midi that comes with the session perc adpak?

SteveStrummerUK
This worked out extremely well for me as I only have AD1 from a previous version of SONAR.
 
I mainly play and record metal, but with Superior Drummer and a few packs I'm fairly well covered for that genre in both drums and MIDI, so I decided to indulge a few other styles in my choices:
 
ADPAK:

1. Studio Rock
2. Indie
3. Fairfax Vol 1

KITPIECES:

1. Ludwig Supraphonic 402 Snare
2. Premier Gen-X Bass Drum
3. Sonor Designer Snare

MIDIPAK:

1. Reggae
2. Punk Rock
3. Blues

 
Pretty eclectic selection, don't you think
 
 

Yes, very nice!

I've been on the XLN site for about 6 hours over the last 2 days because I only have AD1 and no other packs of any kind.  I've listened to the demos ad-nauseam but am pretty damned impressed that these kits do all sound different.  
 
One of the hard things is I can hear a lot of "processing" within AD2 on the demos that have probably have skewed my decisions:  (Full disclosure: I'm a rock-n-roll old-school pop guy who uses only RMX [with packs] and Session Drummer other than AD1.)   
 
ADPAK
 
1) Fairfax Vol. 1
 
2) Studio Pop 
 
This scares me because I tried like hell to like the Studio Rock kit better, and when I decided that Black Velvet just sounded a bit "muddy" to me, I realized my selections were not exemplifying my tastes.  I though about Blue Oyster too, but for whatever reason I think I need this.
 
3) Indie (just because along with Fairfax & Vintage Dry it was my favorite demo.)
 
KITPIECES
 
I was really disappointed in the lack of selection, I had recommendations from a friend but only one was still available.
 
1) Ludwig Supraphonic 402 Snare (it really stands out).
 
2) Pearl Masterworks Snare (It does sound like something I don't have).
 
3) Cajon (Because I really liked the sound, and the bass drums didn't impress me, and I couldn't select a tom, cymbal or hi-hat.)
 
MIDIPAKS
 
1) American Rock
 
2) Alt. Rock
 
3) Writers Block (Very highly recommended to me.)
 
So I will think no longer about this for a long while.    I will be getting more at some point.
 

I don't believe any midi comes adpaks. They may have a small sample or something, but not the entire thing.

Thanks Clint. Maybe I mixing XLN and Toontrack up.
 

Yeah, the midi always comes with Toontrack ezx's and they cost a lot less. I still like having both.

ADpaks: Fairfax 2, Indie, Jazz Brushes
 
MIDIpaks: American Indie, Ballad Grooves, Jazz Brushes Grooves
 
Kit Pieces: Bongos and two Mandinka drums (I can't remember which ones)

I've made the point to them that I would like it to be my complete percussion source, but lacking simple shakers mean loading something else for these thing. Shaker family i so large and they have nothing. Hopefully will see some kit pieces fill this slot this year when they go studio to  records some more kits. ,

Yes, I was surprised by the limited number of kit pieces, and the lack of any of the shaker family is particularly surprising seeing that they've been a staple component of drum machines for a very long time. Fortunately Dim Pro covers many of the gaps.