I am so thrilled that Crane came out with a top fill humidifier!  I have been waiting and they finally delivered!  The new 4-in-1 has been one of the best baby items we have for our twins.  The top fill has made having a humidifier less messy and it has been a breeze to clean.  The sound machine function is a must and it toggles between different sounds and you can adjust the sound level.  It also has a light feature which we don't use too often but my 3 year old son loves so I can see this humidifier being used for the next few years.  Also one neat feature about this is that the annoying little light (the one that keeps you up at night on the small electronics) turns off within a few seconds of choosing the humidifing level.  The only downside I found with the 4-in-1 is that the sound and light buttons are touch buttons which in the dark are hard to find.  Other than that, this humidifier has held up to the Crane brand and I will be buying more for our other rooms!