I bought one for myself after trying (and breaking) my daughter's, which I repaired with readily-available spares. Then I bought an "I don't fly" model for spares, which flew perfectly, so now have a fleet of three, giving about 15 minutes of occasionally violent fun as I try to manoeuvre them around obstacles. The controls need a very steady hand and the choppers really need a large room with few obstacles if they are going to last very long - and a good eye and set of precision screwdrivers to change rotor blades etc that get damaged after repeated crashes. However, the machines are very robust and forgiving, even working after a ditch in the fish pond (they don't really work outside except in dead calm conditions - slightest breeze affects them because they weigh so little). I'm 57 and should know better, but I have to admit I'm hooked!
P.S. The Apache S109G was a disappointment - only about 2 minute's flight time.