I bought one of those $25 cheapie indoor copters at JC Penny last Christmas. Was fairly fun to fly in the house, but I was never able to add enough directional trim to make it fly perfectly straight. I maxed out the trim knob, but it still turned by itself.
I finally got bored with that one day and attempted to fly it outside. It took off to the west, started climbing and stopped responding to the remote after only about 10 feet of altitude. It flew completely over the neighbor's 2-story house and crash-landed on his back patio awning. It was never quite right after that, so I trashed it.