I have 2 WodentWheels..One is larger & double width so they can run together, or drive each other nuts for a while, 'cause they go opposite ways, and my boy likes to play around peeking & poking out of the holes..I do recommend the 5 hole if possible..You can see them easier..and my girl can get a full glide rythym going.
Yes they are noisey, but can be hung upside down, or anchored anywhere, by zip ties..I can still hear them a bit, but I kind of enjoy the sound of them playing at night..It gives me a comfort level.
You must take them apart to clean, because they poo & pee in them on occasion..(reasonably, it is my male)..and they can get stinky.
However, the nail trim track is also able to be soaked & scrubbed w/ a brush!!..It also works on their nails well..I just am sure to check their feet every day, to know when it is time to switch from regular trax to trim trax insert.
You cannot beat the price..That is why I didn't hesitate to get two.
Good luck w/ your search..I'm sure You will find any (safe) wheel very entertaining..and of course, it is much needed exercise for your beebees.