I too have an artificial lawn, mostly because my husband has severe allergies and even though I used to cut the grass it made him suffer dispite taking meds, I too can say I never get any flooding, water drains through it, I also don't need to hoover it, I just use the leaf blower on it, it stays looking nice all year round, I have a dog but he doesn't do his business on it, he has a part of the garden with gravel that he uses, I have large borders full of plants, I also have lots of trees so definitely does not affect wildlife, I have lots of birds, squirrels, hedge hogs too, I like it, as it looks extremely neat and suits my modern house and garden, in fact lots of houses have artificial lawns in my neighbourhood, and there's never any flooding issues, each to there own but personally I like them and would never go back to a real lawn now.