Cons: doesn't do its job!
I wanted to get the most eco-friendly toilet I could afford so chose the Pegasus. I am very disappointed with its lack of performance. It just doesn't flush solids on the first- or sometimes third- go. It has been installed correctly, the problem is with the shape of the bowl in my opinion. Plus it is a very weak flush. Big shame.
I have deliberately left Ease of Installation as N/A; it was bulky and heavy nut no more complicated to install than any other toilet. I don't have any other products by this manufacturer. And won't be rushing to buy any, either.