They're safer too. The muscular mass is like a cushion protecting the bone (which is why Guichet cares so much about increasing it) and the internal method makes you much less vulnerable to infections than the external one. About the scars.It's true that this operation cause much less scars than the tibias one, which is very important, but there are the type of scars caused by strengthening of the skin during the lengthening (stretch-marks). So, maybe I won't have problem with operation scars, but I will worry about lengthening scars. The problem is still there, in one way or the other lol Luckily, I know a good cream to prevent these kind of marks, and in the worst scenario, there is always laser. Among all the mental problems I have since my childhood, for my low height, and the risks I will face with the operation, the marks are the last issue.