zeeoo,
I agree with CRAN. Gyro's are the rotorcraft of choice for the recreational few. This is because they are; inexpensive to buy, easy to build, simple to maintain, and exciting to fly. If the pure gyrocopter was competitive with the helicopter, there would be Carter and Groen Bros. products in the air, as we speak.
"One thing is sure : you can solo someone after some hours of good training on a gyro, can you do that with an helicopter ?"
In 1948 the symmetrical Kaman K-125 was flown by a housewife with only 2 hours of ground instruction and 36 minutes of dual instruction.
Dave