One of the things I like most is the removable protective cover, which adds an extra layer of safety for my betta. It prevents direct contact with the heater, reducing the risk of burns, which is especially important for smaller tanks where fish can’t always avoid equipment. The heater maintains a consistent temperature, and I haven’t noticed any major fluctuations. It heats up quickly and does a great job keeping the water at the desired level. The LED display is clear and easy to read, so I don’t have to guess the temperature.If I had to point out one downside, it would be that the preset temperature settings can’t be adjusted in very small increments, but it hasn’t been a huge issue for me. Also, while this heater is great for small tanks, it might not be powerful enough for anything over 5 gallons.