Hello. I'm redoing 3 bathrooms at the moment and was planning to install RAK rimless toilets with Grohe cisterns/frames for all three based on recommendations from my local bathroom shop. Since then, I've found some reviews that say RAK toilets look great but struggle with flushing anything that's not liquid and that there is often an issue with even toilet paper not going down/skidmarks etc because of the way the pan is designed. Any plumbers on here with experience fitting RAK toilets? Are they all style & no substance? And if so, which brand do you recommend?