I appreciate the compact size and convenience of Bowflex's 552 Dumbbells. I have little trouble switching from 7.5 to 15 pounds and only have to make a slight turn if the weights do not lift up right away. I use the 552 Dumbbells for P90X workouts and general strength training such as back squats or individual hang cleans. The reason I didn't give it 5 stars is because conducting the P90X's tricep extensions with the palms facing the ceiling with the dumbbells is a bit difficult due to the dumbbell's width. I make an adjustment by moving my arms further away from my body to be able to make a full extension and after a couple of repetitions, I've got the move down and still receive a great tricep workout. Great product otherwise, easy to use and very sturdy!
Pros: Durable, Easy To Use, Multifunctional, Targets Muscles
These are a huge improvement over my old plate/adjustable dumbbells. It's amazing how much faster I can move through the p90x workout. Very happy with these -- and loving the stand (or my back is, anyway). Hightly recommend these. The only downside is the length of the bar with low weights. This was similar to my old set, but it is only a minor incovenience, more than made up for by the fast workouts!