Very easy installation with 2 different ways depending on the toilet system. The instructions are quite detailed. The only point that might bother some people is that it closes a bit slowly, but for me it was not a problem. The quality of the plastic is quite good but it cannot be compared to more expensive and sturdy models. However, it is an excellent value for money and for the 3 months that I have it, I have not regretted it at all.