Definitely strong. The last time I flew mine, one of the engines decided to lose a nut and the whole thing crashed onto the tarmac from about 25 feet. Several engines and propellers are broken, but this dull frame shows no signs of damage. I wish it had more room for the electronics, but it wouldn't look silly, but that's my fault. One thing to watch out for is the wonky motor hole spacing. . Not sure what to attach to it, but my custom $5 HobbyKing motors definitely won't fit.