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For that kind of money you could buy a really decent, ready to fly (RTF) Nine Eagles 228 SoloPro or a Walkera CB180D or a Walkera CB180Q Airwolf. They both 4 channel, fixed pitch, RC helicopters with a flybar and built in gyro. They're easier to fly, faster and MUCH BETTER better build quality. And you'll still have $70-50 left over to buy a trainer kit, some spare rotors and an extra battery.
The Double Horse is more like a 2 trick pony. It's not RTF (ready to fly). It's not 710mm long like they say - it's only 550mm long. Most of the YouTube videos are about DH 9104 modifications to make it fly better, and not forgettting it's so big it can't be flown indoors and yet it won't fly well outdoors either, unless there is very little wind and it has an extremely short range - so you won't even get to fly it much.