Very in depth review over on Android Police.
http://www.androidpolice.com/2016/07/26/moto-z-review/
Just posting the conclusion, but it's definitely worth reading the full review.
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" CONCLUSION
When it comes down to it, these aren't bad phones. They aren't great ones, either. I don't think that I can recommend the Moto Z or Moto Z Force in their current state, especially when you consider the pricing. You're looking at $624 for the Moto Z and $720 for the Moto Z Force. That's Galaxy S7 money, and that phone doesn't practically beg for a raft of expensive "modular" accessories.
I want Motorola to convince me Moto Mods make sense, but the examples we have so far don't do that.
The design of the Moto Z series is based on the premise that Mods are necessary, and they just aren't. All of the design features I liked about Motorola phones in recent years have been dropped in the interest of making the Mods work, which seems like a decision aimed at making money on accessories more than making a good phone. I want Motorola to convince me Moto Mods make sense, but the examples we have so far don't do that.
The only one I can see a real argument for is the Power Pack, but that's because the Moto Z was designed to be thin and have a small battery. Still, attaching that Mod makes the phone heavy and unpleasant to use.
There are things to like about the Moto Z despite all that. The Z and Z Force are very fast phones, and the version of Android they run is clean and has useful features. Verizon's bloat is annoying, but at least the unlocked version won't have that. Although, the Force will remain a Verizon exclusive. Only the regular Moto Z will be available unlocked.
Don't get me wrong; I like that Motorola is taking risks with smartphones. I just wish the risk wasn't such a blatant cash grab in this case. If one of the Mods is for some reason exactly what you've been waiting for, and you don't mind the price, by all means go for it. Likewise, if you just think the snap-on accessory thing is cool and want to take a risk, this is the phone to get. For everyone else, you should at least wait to see if Motorola can release some more compelling Mods."