adidas adizero Boston 12

I did my first three marathons in the Boston 4, 5 and 6 then switched to On to change things up.  I tried the 10 and 11, both were terrible - super clunky.  The 12 is a completely different shoe, it’s fast, light, the right amount of torsion and looks nice.  It’s my go to training shoe for tempo days.  (Have two BQs and completed multiple full IMs).  There’s too much technology in other shoes to make this a race day shoe, but if carbon plates didn’t exist, this would be my shoe.

I love the balance of fit (perfect foot shape, forefoot room) heel lock down.  light weight , durability, versatility. Responsive, Bouncy and protective Cushion and performance. I use for all runs, short, long, slow , fast and road and trail. I do mountain, ultra trail running and racing. But also train for road half/marathons. This shoe is my go to most of the time. 
the lacing system and lockdown are the only flaws I see. 7-10 score there. But it’s not a deal breaker. The softer light strike 2.0 is great. Still I would love to see in the next version a better lockdown/lacing and a version called Boston Pro 13 with all lightstrike pro cushion! That would make this shoe the best! Also a trail version with same upper But continental trail grip with 3.5 mm lugs. Hallelujah! 

This shoe is so ugly. My first high stack height shoe, and honestly, I almost couldn't pull the trigger to buy them. I've always run in lower, lighter shoes from Adidas. But, wow! Once I got these on and put in a few miles, the ease with which these roll through the toe was just obvious. It is so much less effort to keep the cadence up and get this aging frame through those easy miles. While I won't convert to this shoe entirely, a pair will certainly remain in the shoe rack for easy distance runs in smooth terrain.

The ride is awesome. Feels good at steady marathon pace and is easy to handle various speeds. The outsole is grippy and looks completely new after 100km.

*HOWEVER *

The upper feels like a plastic bottle that cuts into your ankle and it’s extremely uncomfortable and nearly impossible to get a decent fit.

The laces are absolute garbage and have been undone during runs and workouts on multiple occasions.

The tongue is flimsy and is not secured properly.

I would stay away from adidas personally because their upper is just not good.

From first wear, this shoe was comfortable yet snappy. Runs about ½ size bigger than Saucony and Nike. The toe box was perfect, but I do have wider feet. The only complaint is the tongue wrinkles, so you need to make sure there is no folding over, or it could cause discomfort.

Works well for long runs, easy runs, threshold intervals on mixed surface. 

Great for speed work, workouts, tempos, progressions. They are very light, but work well for easy miles too.

improved cushioning, good for easy runs up to tempo, not so much for intervals. fit is a bit weird, lacing makes it hard to keep it snug and the heel is a bit loose

As a high school runner who doesn't want to spend 250+ on super shoes all the time this is a great alternative. This shoe with the carbon fiber infused rods gives a good push without it being too much at times like with a plate. This is very nice when you get tired because the full length plate normally messes up your form. The price is also great because you won't be scared to tear these things up because they aren't as expensive.

Not a big change from previous models.  At this price range you can get other shoes better for the Boston 12 cost.