The last thing you need is to have to put everything down to check a bottle constantly. Every time myself or my wife tried to warm a bottle in this thing, it either came out too hot or too cold. Having to constantly check the bottle became too much of a hassle and we simply quit using this warmer. Despite following the instructions to a tee, the bottles NEVER came out perfect. We either had to re-heat the bottle or let it cool down before giving it too the baby.To make things short, I'll say this: Use the stove or microwave. Once you get your child into a reasonably predictable routine, you can warm bottles at a reasonable time and easily without having to waste time and money on the First Years Quick Serve Bottle Warmer.