In over 25 years of dog ownership, this is probably the easiest to use scoop I've owned.
Con, the bucket can be difficult to swing back into place sometimes. Still, not a huge deal and pretty easy to resolve.
I *think* metal would be more durable but I can't say for sure. I do worry about longevity with it being primarily made of plastic. Those are really the only cons I can think of.
Pros
I love the bags, I twist the excess bag and push it through the holder on one side. The scoop is large enough that I can pick up after my 25lbs Boston and 55lbs Pitty every day and only need to change the bag every 3-5 days. The bags keep the scoop clean, and the scoop is large enough to hold several days worth of poop before needing to be changed. Again, I'm really very happy with this purchase.