I cannot stand the smell of Simple Solution, I hate the lingering sickly odour it leaves.
I am a fan of ' old fashioned ' cleaning solutions generally so make up my own mix using white vinegar ( not malt ! ) and essential oils. The smell of the vinegar vanishes completely once it has dried.
My one cat who does have occasional accidents will still use spots treated with Simple Solution, no matter how much it has been cleaned ( same for biological washing powder solution ).