Kaihong was nice enough to offer detailed pics & dissection starting with this post:
FWIW, I ended up using it for a few hours wanting to really like it but ultimately unloaded mine on eBay a few weeks ago (yes, I'm the one that created this thread!). If it was the only stick I own then I probably wouldn't mind modding it. IMHO, it's a mid-tier stick at best but just too much work (dremeling the bottom of Sanwa buttons to make the OEM LED's fit in there with Sanwa SW-68 microswitches, using spacers to make a JLF fit, adding weights, etc.) to make it a quality top-tier stick (just not motivated enough to do all that easy yet tedious work). A little annoyed (I'm over it, ha!) WB didn't allow PDP to announce (before launch date) exactly what components (manufacturer) would be inside of it but I guess now we all know why though most of us suspected it wouldn't be top-tier components from Sanwa or Seimitsu anyway. Love the semi-grippy rubber texture (spray on?!?) of the case & LED lights...but that was it! I probably wouldn't pay no more than $75 for it but that's just me. Also wasn't feeling the Namco Noir/Astro City button layout.
If you guys/gals don't care about the LED's (vibration option in-game aka damage when you get hit) then for $60 (shipping included for the time being) this is the better option (if you're ok with a Vewlix button layout & a ball-top) since it's less expensive, includes a table mount/clamp, octo/circular gates, button plugs (for the last 2), USB-cable storage compartment & has the same exact components in the Injustice stick minus the LED's:
Case material: Plastic with spray on (?!?) soft rubber matte black texture & thin foam bottom panel. Clear top panel is plastic. There are no metal panels. Also has a detachable 10+ feet USB cable.
Artwork: Heavy duty cardstock underneath the top panel.
Components: All Qanba-based (Omron microswitches for the joystick lever just like in a Sanwa JLF) with individual button & joystick lever LED's. Black bat-top & clear shaft cover.
Weight: ~3.5 - 4.0 pounds.
Modding: Hex screws on the top panel & Phillips screws on the bottom panel. Will fit both Sanwa & Seimitsu 30mm buttons & ball-tops.
Additional features: Two options for the LED's (on & pulse aka vibration as there are no vibrating motors). Lockout of Start, Select/Back & Home.
FWIW, the game developers are the same one's that did MKvDCU & the MK-series. Just like the previous PDP MK sticks (TE & Klassic) surprisingly, it has excellent fit & finish. This Gamestop exclusive bundle is for the PS3 & 360 but not for the WiiU (the mention of this in their PR is an error they retracted).
Edit 2 (4-8-13): Credit goes to forum member, DirtyLary:
From here: http://twitpic.com/ci0g1k
Credit goes to forum member, butteroj:
Credit goes to forum member, LiQuiD[EViL]: