I mix it with benching and other shoulder exercises and the pump i get in my front delts, bis, and fore arms is great. I dont push it to the 80s or 100s very often, but i do hammers a couple times a week.
I love doing these as i warm up for bench and deadlift, i feel like it wakes up my arms and grip completely.
Ive noticed huge debate over form, and if you saw me do these with 40s or 60s it would look a tad different. But i feel like when you overloading these from time to time it is beneficial. Theres usually people who take bad form to a new level and id like to think mine is still within reason