Can anyone recommend a wall-hung toilet model that will really flush well and won't splash on the toilet seat when it is flushed? I have Duravit (DuraStyle) with Geberit, they looked great and I like the elegant design. But their performance sucks, I see a lot of water went through but it needs flush 5 times, and even just throw simple toilet paper need to flush twice, and water splashes when it flushes in both high and low settings. It seems like a common problem with wall hung toilet. Would love to see if anyone know of ones that actually works!