I have had every version of the wave lightning from the 8 on up and this is the first one I didn't love. That doesn't mean they are bad. I just don't love them as much as the older models. The tie box is a bit bigger both in length and width. The top of the shoe is made of somewhat sturdier material than past versions, so I haven't had the issue of mybig toe eventually poking through (usually after ~300+ hours in them), which spelled the death of my 19s and 20s. But the tougher material wasn't worth the sacrifice. The sole of the shoe feels almost uneven, as if it drops off mid Instep and Causes my feet to hurt whenever I run on hard surfaces (luckily I mostly train on turf so it hasn't been a deal breaker). To be fair I am pretty flat footed with narrow heels so this might not be an issue for others. I would still recommend the wave lightning line, but might suggest skipping this version. Looks like they moved manufacturing for this shoe from china to Vietnam- I hope they move back or address these issues before the next model