Overall, I like these. I use them three times a week. The mechanism makes them a little bulky but it also facilitates fast changes, so it's a trade-off. There is plastic in the construction and therefore I do have some concerns about long-term durability. I certainly would not recommend them for commercial gym use but in a home environment and used reasonably, they should hold up. Occasionally the mechanism sticks (i.e. when I select a different weight, the dumbbell sticks in the stand on first pull but so far it has always released on the second pull). It doesn't happen very often and it may have to do with how carefully I select the weight setting. But I wish it was not quite so finicky. But this is not a negative review and I do recommend these weights. I also got the stand for the weights. It wasn't inexpensive but it does make using them so much nicer.
Pros: Convenient, Easy To Set Up, Easy To Use, Quiet
I am using the six week challenge now. I love the versatility of the dumbbells. The bench is great as well and the videos provided show you the proper form. All together it is a great workout!! We also have the M5 to compliment the dumbbells. Love both!!
Pros: Comfortable, Durable, Easy To Set Up, Easy To Use, Strengthens
the 552's are a great edition too my max trainer m5! get off maxtrainer heart rate up hit the 552's for a complete workout tks bowflex you guys ROCK! get a maxtrainer also no need for a gym membership!
Pros: Comfortable, Durable, Easy Storage, Easy To Set Up, Easy To Use, Quiet, Strengthens