Walkera electronics is total crap! Their transmitter is the worst piece of s&*#t I've ever seen!
Of course, you can make a decent or even great heli out of a Dragonfly, but only if you replace a bunch of parts and all its electronics. Don't be fooled by the low price of "ready to fly" Walkera package--you'll spend tons of money upgrading it. Just put Dragonfly and T-rex side by side and compare their quality. There will be no comparison. Then, take Walkera transmitter and compare it to, say, Hitec Optic 6. You'll see what I mean. Of course, T-Rex with a decent radio will cost a bit more, but avoiding the frustration of crappy Walkera is priceless!


If that will be your first heli, consider reading this Electric Helicopter Beginner's Guide:
http://ehbg.rchomepage.com
(look for the file "ehbg-15-pdf.zip")

Boris