I’ve been in the hobby over 20 years. I have used all kinds of heaters, glass, shatterproof digital, you name it currently have 2 of these in a 75 gallon discus tank. Have 7 beautiful discus, 12 cardinal tetras, 4 cories and 2 German blue rams. These heaters Keep the temperature on my digital temperatures completely accurate - 1° no failures yet knock on wood. Everything has been great. Would tell the company to charge 15$-$22 a heater for 200w would be a very fair price. Thank you again.