So far these dumbbells have been what I expected - convenient, taking up little storage space, and good enough for someone like me who isn't trying to be Mr. Ripped. The con is also what I expected - they are clunkier and less comfortable for some exercises given the way they are configured. But for me, they do the job. I may supplement them with some kettlebells in the future.
Pros: Durable, Easy Storage, Easy To Set Up, Easy To Use, Quiet
I use them 4-5 per week for 30 minutes each workout. As a busy father, they don't take up a lot of space and provide what is needed for a quick workout.
Pros: Comfortable, Easy Storage, Easy To Use, Quiet, Strengthens