I use the 552 adjustable dumbbells in my home gym. They take up very little space and adjust easily and rapidly so I can move through my workouts quickly. Very happy with the product!
Great product, use them everyday for home workouts. Only con is that they are a little big/wide so for certain workouts (rows, etc) they are difficult to navigate.
Pros: Comfortable, Easy To Set Up, Easy To Use, Strengthens
The weight sets are a bit bulky when doing some lifts, like over head lat extensions, but nothing too terrible. changing the weight is super quick so you don't have hardly any down time between exercises. If I had a suggestion to make it's buy the stand to hold the weights. I have mine on the floor and I'm thinking when I get past 30 lb curls it might not be too good for the old back.