title: About STM32 HAL quality and performance
body: <p>I'm about to start a new project on a classical STM32L4 based product.
  I have a good experience in ARM developpement but not in STM32 specifically.
  I am wondering what is the quality and performance of the STM32 HAL and low level drivers provided by STmicro (in the package STM32Cube).
  I'd like to gather developpers experience and feedback on the topic.
  Basically I'd like to know if you are happy with this code or on the contrary if you encounter some issues, if some of you developped their own drivers for some reasons, etc...
  Thank you !</p>