I've been using this pair of dumbells for over 2 months now, and I have to say that I have been very satisfied so far.
I needed something that would give me more variety--my gym has a great weight machine but I was rapidly getting used to it. I needed dumbells I could use with little time adjusting the weight so I could concentrate with my workout pace.
This filled those needs. Adjustable dumbells that go from 5 to 52.5 lbs (each, as a pair 10-105 lbs.). It is easy to adjust the weight and unlike the previous model, the pin is made of metal and it holds the weights in place more securely. It comes with easy to read instructions and even an exercise video to help you along.
I did not buy the stand since it is a hard one to assemble. I just placed it on a secure metal table so I don't have to pick them up from the floor.
The only downside I would imagine is that if you like dropping weights during a workout, this may not hold up to that kind of punishment. I don't drop weights so it works for me.