Have had this for 3 weeks now (Since Christmas) and also have 5 other RC helicopters (yes, i'm slightly obsessed!).
If you have a large space, this is the best Chinook to buy. It is very powerful, stable and easy to control but I emphasize you NEED A BIG SPACE. Having said that, once you have mastered the controls it is stable enough to fly indoors - if you're brave.
Bad points: Battery doesn't last long, Creates massive downdraft, noisy.
Good points: Fun, easy, powerful (attach a string+hook to lift small loads!), stable, battery charger has proper lights to show you when it's finished charging, anyone can fly it.
After numerous high speed impacts, the tail rotor has finally given in (being a bit too daring indoors) so am on the lookout for a new one now, oops!