Eheim Jager heaters are renowned for their performance and reliability. Even though they are a glass heater they are built to last and usually will last many years before needing to be replaced. Taking over by Eheim the EBO heaters have been used by hobbyists for years. We have personally used a Jager heater for over 10 years and still is reliable today!
We always recommend using an aquarium controller or temperature controller with any/all heaters available. You can never be to safe in the hobby, and only takes something minor to kill your loved livestock and corals.