The Dohm is my favorite sound machine out there and after using many different sounds from the swing to iPhone apps, I think my baby would agree. I love that the sound machine can be adjusted to different levels by simply switching a button to high or low and also by twisting the actual machine for more variations.
Having a sound machine in the room with baby helps them fall asleep and stay asleep longer. It is also a great tool to add to babies sleep routine. Hearing the sounds helps baby know it is time for sleep. Dohm is also recommended by the National Sleep Foundation which gives me an added comfort when using it.