Yes, you may have read this review before, because it applies equally to a pair of Cloudflyer 4's I purchased at the same time. The good is these Cloudrunners instantly accommodated the shape of my foot, plus they are supportive, responsive and comfortable. The bad is that the heel cup (Achilles area) material split open after barely 100 miles. I always tightly cinch lace them and loosen them fully when before putting on or taking off, so it's not from misuse. The fabric in that area is simply not durable, proven by the same problem recurring in the two different shoe models. Only just now getting to reviewing them, but when I called RRS to seek a remedy they said I was one week past the 6-month warranty and thus would not help me. Really??? Won't buy ON shoes again, nor anything from RRS; lots of good alternatives to both.

Very stable platform without forcing your feet to align a certain way like the other stability shoes. It's protective from all sides and the tongue is thick. I feel the weight of them but for a slow to medium pace they are great and for short accelerations during HIIT sessions I didn't notice that I am slower in them. Probably too heavy for fast pace long distance runs.
It fits my style of training - slow/medium pace 5 mile runs and short distance accelerations. Excellent fit and comfort was the main reason for purchasing them but if most shoes fit you well and your feet don't hurt then you should buy a lighter pair.

The On Cloud Waterproof running shoes are a fantastic choice for runners seeking comfort and protection from wet conditions. These shoes feature a waterproof membrane to keep feet dry and are designed with the signature CloudTec cushioning for a responsive and comfortable run. They offer a sleek design and reliable grip, making them a great option for tackling various terrains while maintaining lightweight agility. Overall, they provide a blend of waterproofing, comfort, and performance for dedicated runners.

These shoes are perhaps the best shoes in the On Cloud collection. They have good stability system in the medial section of the shoes. Balance cushioning so that the heel does not sink on the shoes. The rocker for quick start is not very aggressive.
The heel to toe drip does not seems crazy. Over all I like the fit and ride of the shoes.
The upper is high quality with good lacking system and tongue. The outsoles seems good and this version has been cleaned up to avoid small stones to stuck in the cloud pod empty spaces.
The shoe is not narrow and gives a nice and stable fit lots of space in the tie box area.