I purchased 4 of these Chateau dual-flush Elongated one piece toilet for my brand new house. They look awesome unfortunately they continually get blocked as for the low flushing power which is a very disappointing and embarrassment. All new plumbing as it is a new house as mentioned professionally installed 
Buyer be advised and aware of this product is junk the manufacturer should supply with a plunger with every toilet they sell. It’s junk 
I would certainly like my money back for all 4 and have them replaced. 
I also just discovered I cannot put a bidet on this style toilet. 
Disappointed buyer