For me it depend on what heli I am flying. The 700 has never crashed. The 450 I have never crashed. My 300, 130x, and Mcpx to many to count. Those I really push hard and do a lot of learning on those helis. I've pretty much been using the 300x lately and the 130x, Mcpx just don't get flown anymore. If I just take 4 batteries with me at a time I seem to do well. If I take more then 4 I end up getting to aggressive and I crash. Now if you count the number of times I hit captain rescue probably 10 times a day.