This article is from the Radio Control (R/C) Flying FAQ, by Shamim Mohamed firstname.lastname@example.org with numerous contributions by others.
There are a couple of pretty good electric helis on the market. One is
made by Kyosho (the Concept EP), and one is made by Kalt (the Kalt
Whisper). These machines are small, light, delicate, and squirrely. Not
the thing to try to learn on. They are more novelty items for experienced
R/C heli pilots.