"this was used to replace an existing trap. it appears well made and a good fit. no leaks at all. the center stands proud about 5mm but this is not a problem for me. the center part is of a good design that locates well,is easy to remove for cleaning and looks as though it will last.
cannot comment on reliability as its simple and time will tell."
"This is described as fitting a 50mm waste hole, and that is technically true. However, the chromed threaded part that seals down to the tray is about 85mm across, and would not fit inside the scallop around the waste hole in my tray. If I had used this, it would have therefore stood a couple of mm proud of my tray. Since you can't find this out until you open the bag, I thought I should mention it here. Other than this, I felt it was a nicely made piece, although it lacks a traditional grid under the dome. I've scored average for performance and reliability since I haven't actually installed it."