I learned in S300's on dollys. From the very beginning I was nervous, and never did get completely over it. It was a luxury if the student before me would leave the helicopter on the grass instead! I suppose that it made me better pilot. The log pad work in the mountains did seem kinda easy after the dolly. Not that there was any more landing area, but there was not a hangar right in front of me, and an expensive B206 right beside me! I won't be sorry if I don't need to use a dolly again, but I suppose that it is part of complete training.