I love to give my pet hamster the best life has to offer and for my Syrian I found that this works best. It works great for me too, because its silent. He can run all he wants and I won't hear it in the middle of the night (note: you do have to tighten the screw in the back if it starts to make a little noise, easily done by hand and only takes a second, I've only had to do it every few months). Absolutely worth the investment. Purchased mine from Petco and this is what they recommended, I did buy the 12 inch model and with the stand it quite tall (13.5 inches), comes in assorted colors, you can also attach it to the cage wires, but I keep mine in a 16 inch tall aquarium.