This has turned out to be indispensable in getting our baby to sleep, and for longer periods of time. I haven't used others, or done much research, but this one works great. Compact size is useful in a one bedroom apt and for being able to help him nap on the go.
I bought this because my daughter has one ... although hers goes much louder than mine I am happy with it. Still could go louder I do not know why they limited the volume on the new ones.
I travel for work and this little unit works for any type of disruption you may encounter. Noisy mini bar fridge? room A/C or heater sounds like a 747? Noisy neighbors returning to their rooms as if it was the middle of the day? No longer a problem! this little but powerful unit will mask and mellow disruptive sounds. And it has plenty of battery to make it through the night and then some before recharging!
We got this versus the baby version because others said it was essentially the same machine. I wouldn't know that for sure since we only have this but it is certainly getting the job done. Plus we just needed a little something for the baby while we were traveling. When we turned it on, I swear I wanted to go right to sleep! The noise we chose emits such a deep, soothing sound for such a small machine. We use it every night instead of baby's other machine now since it stays on all night & it's a great sound. Kind of a weird feature, but when it is plugged in and charging, you can't turn it on. It's not terribly inconvenient to unplug, turn on, and plug back in but I thought it was weird. We keep it plugged in consistently since it is baby's main noise machine.
In the past I've packed my full sized Dohm when I travel. It was inconvenient and took up a lot of space in my luggage. I was ecstatic to see a travel sized Dohm. I love the size and that it's rechargeable. I'll never travel without it.