Quoted from xTheBlackKnightx:

I have yet to see anything in a Stern game that is revolutionary regarding design since 2001.
Every single device used in pinball design has been recycled since 1932 in one variation or another.

Quoted from JY64:

People seem to think deeper is better even when the game gets so deep that they will never see the wizard

Quoted from Eskaybee:

For those writing off WOZ; you're really missing out. It's a classic pin where an average layout at best is made amazing with the code and insert design matrix. Here's my quick tip guide:
Rules: here's a quick 'basic' summary of rules going counterclockwise around the table.
Crystall Ball modes: spell B-A-L-L then hit spinner shot to start a 2-ball multiball that will effect the playfield in some fashion.
Haunted Modes: Spell haunted via pops then get the ball into the haunted lane by the pops to start a haunted mode. Note: once haunted is spelled you can kill the power to the pops by holding both flipper buttons - this can help nudge the ball into the haunted lane. Cool and fun feature!
Rescue mb: 2-part mode- Part 1; hit two targets in the pops to light capture dorothy then make an orbit shot for the monkey to capture her. Part 2; get ball on mini playfield and spell R-E-S-C-U-E, 3 ways of doing this - 1. hit targets and collect their respectful letter, 2. hit the 'search' loop shot - each shot adds the next letter in sequence. 3. bash the door to open it then put the ball in the hole and you'll be awarded the 2 next letters. Once you spell rescue (and have captured dorothy) you have 2 options, bash the door down and start rescue mb, or hit the search loop which will add a ball lock to the multiball in which you'll have to spell RESCUE again to start (or lock another ball) to start the multiball.
Wicked Witch: Hit the witch to start hurry up modes against the witch. Collect hurry ups by hitting her. Do enough witch hurry ups to play the fireball mode (real fun mode).
ECMB: Spell lion, scarecrow, tinman via the (3) rollover targets on the playfield. Each character represents a ball lock. Lock 3 for multiball.
Munchkin modes: spell R-A-I-N-B-O-W then loop the ball around the twister/house a bunch of times to start munchkin mode.
All these modes are unique and stackable! If you play all the modes mentioned above you'll get a chance to battle the wicked witch (BTWW) and melt the bitch!
That all said; it's things like making a shot to start a 2nd or 3rd multiball, or stacking modes, or playing the upper playfields while playing the bottom one that makes the layout so great. Making critical shots and knowing where to put the ball that make the shots satisfying. Overall, WOZ game is amazing - but the theme does blow...but the oz and Dorothy call outs are fantastic and so is the music.

Quoted from jgentry:

In a few cases that may be true but overall stern games do not flow or combo as well as most top B/W games. They have the speed but not the flow in my opinion. GB has absolutely zero flow and the ball returns suck. TWD premium/LE is another layout disaster in my opinion were the ball flies of the ramps, shots do not setup other shots, etc. ST, IM, Tron, SM all have a good combination of both though. Compare those to WH2O, MM, SS, TOM, etc and which games are truly smoother shooting? If anything sterns designs seem to be going the opposite direction with recent releases.