I've had a set of the Bowflex 552's for past couple of years. They've done me fine. Decent solid bit of kit, although I've never dropped them and really quick and easy to change weight.

The only drawback is no matter what weight you dial in, they're always the same size which can mean they're a little too big and clunky for some exercises although I just got used to it.

I need some now that go a little heavier. I was originally looking at the heavier Bowflex but they seem even bigger. Just been looking at the Nuobell or Primal Strength ones that both not only have adjustable weight, but the size changes as well, dependent on the weight dialed in which will make them more user friendly in my opinion.

Malc