I ordered this stool in the 24" size and it fits in my shower perfectly.  I've been using it for 2 weeks in the shower. I bought this stool because i broke my leg and I needed something sturdy I could sit on. Without something to sit on, showering would be impossible. This is sturdily made and is very comfortable to sit on. The shelf below allows me to have my shampoo, etc close by, but the seat is large enough that those things usually sit right next to me on the bench. This bench easily accommodates my 5'6, 140 lb frame. 

Pros: Well-made, took less than 15 mins to put together, comfortable, solid. 
Cons: None