As previously said in a different review, the wheel is weighted, and so it takes the hamster longer to stop running. But it is blissfully quiet.
Please note that this wheel is also a little larger than most hamster wheels, being 6.5 inches diameter, which is excellent. Most hamster wheels are a little too small, meaning that the hamster's back is not straight whilst running, which is bad for the hamster's bones and back. This is the right size for my 4 month old syrian hamster, with room to grow, but if you have a bigger pet, consider getting the next size up.
However, I found a tip on the internet the day before I received mine, to put a small amount of vegetable oil on the attachments of your normal wheel, which should stop it squeaking as much (but does not cure rattling), and it works! So I would try this on your existing wheel before buying.
I will be keeping my new silent spinner though, because of the great size and because it is so quiet.