I have upgraded every electronic component on my walkera DF60..... I have learned SOOO much in the process. So, I am happy with it, for that reason. Over the past 8 months since I got it, I have had 4 crashs, 2 from glitching radio, one from dead battery, and one from pilot error, but none the past 6 moths. All my repairs where cheap, less then $30, and most of the cost is replacing damaged blades. (OR BUYING NEW ELECTRONICS). I would say I got something new for it about once a month.... but I concider it lay away for a better heli, and it allows me to fly in the meantime.
That aside, I would say it is problematic, but its great for the learning.... the frame is really flexible, so its very sensitive if the head is out of balance, or blades, or tail. My heli eats pinions, get about 60-80 minutes of flight before the pinion teeth fail, not sure what the deal is, cant find anyone else with this problem.
But now that I am flying with more confidence, it is actually pretty stable, even in 8-10mph winds. I can hover hands off in calm air for 8-10 seconds, thats stable! Its all plastic, and flys fine. I think the thing I hate most is the motor and battery I have are too weak.... I have little to climb out of a drop.... so its not safe for 3d, but its great to learn forward flight.
I am gonna get a new motor and battery, BUT, I am not gonna mess around with this DF60 anymore, ALL of my nice electronics are going on a new TREX 450..... Its time to jump to the next level.
And thats what this heli is good for, novice pilots. If I didnt have a $139(rcexpert) heli that was RTF, I would have never started this hobby, there is NO WAY I would spend $1200 outright to give it a try.
But if you are an experienced pilot, Of course you would think one of these heli's is a joke. But even so, I will always fondly remember my first