I just played a LZ Pro for over an hour. Here are my thoughts:
First, I really liked the game and the layout. The way you pick your own song before each ball, and then that song plays for the duration of your ball, really makes it like a Jukebox and I found myself feeling like I was playing pinball WHILE listening to Led Zeppelin moreso than it feeling like I was playing a Led Zeppelin pinball game. It was almost relaxing.
The Good:
I really like the fan layout on this one, and think it is one of the best Ritchie has come up with (even though it is similar to others). The far left scoop is perfectly placed to give some variety and a brief ball hold without killing the flow of the game. The ramps and orbits are great, and the ramps all require solid shots to get completely up the ramp (especially the center and right ramps) which I like. Great smooth action off all three ramps too (although I can confirm there is no way in hell you are hitting the third flipper shot all the way up the center ramp--zero percent chance).
It has the feel of a Ritchie game and is almost like an easier Star Wars because it is a similar layout, but the entrances to the ramps are set farther back and the stand up targets are both farther back and angled away from the flippers so you don't get straight reject SDTM shots like you do in Star Wars.
As far as code, I like that you can select what you want to accomplish to beat each song (20 bumpers, 5 orbits, 10 ramps, etc.) in tour mode. However, it doesn't really seem to have much of a point to the game (as of this version of the code) other than to hit shots and enjoy the music--which is fine, but you better really like both in order to want to keep playing the game for long periods.
Also, I really like the songs they chose, although I wish it had a few more, and a couple in particular...
The Bad:
That third flipper shot that ends curving up a slot with a standup target at the end is terrible. First, it is unrewarding and would never be something you would try to hit unless it was flashing. It really feels like a bridge to nowhere type shot. Second, well struck shots come flying back out of that slot and ricochet off the right side causing the ball to move violently side to side, often ending in an outlane drain. Both of the issues would be completely eliminated in the Premium/LE models, but no way to fix it in the Pro.
The plunge shot is lame. It is not as bad as GNR, and not as dangerous as Star Wars, but it is sort of a weak way to enter the playfield and isn't fun. Stong plunge, weak plunge, short plunge, button plunge-- all end up about the same.
Conclusion:
I really like the flow and style of this game, but I really like Steve Ritchie's style of pinball. Feels like a modern pin, but without a bunch of "stuff" in the way (as opposed to the more typical style of the pins being produced these days). If that sounds good to you, and you like solid long shots up ramps and into orbits, this is a great pin. If you prefer the packed playfield/adventure style progression coded pins like Jurrasic Park and Avengers Infinity Quest, or if you like hitting the same thing over again like Medieval Madness, Attack from Mars or the more modern versions like Elvira HOH, than this is NOT the pin for you.
If you have any specific questions I didn't cover above, send a reply post and I'll respond as best I can. I am also going to give a direct comparison to GNR in that thread if you want to know how I think the two compare as I've now played them both.