This is my first diffuser and I am very happy with it. In fact, I like it so much I bought a second one from this company. This is my personal honest opinion and I get a little frustrated seeing so many reviews on amazon from people who have received free or discounted products in exchange for reviews. I am interested in people like me who have spent their money and bought a product who want to give a review. First, the only issue I have had with this diffuser is that it is difficult to twist on and off when filling. Difficult, not impossible. If you get the hang of it you will figure out how it should go and it will be a little easier. It locks so that the oil doesn't spill, so you can't just twist it on and off like a water bottle cap. Secondly, I have used both high grade pure essential oils and those with lesser grade and the scents and fragrances can fill several rooms, especially the more potent ones. I have never had a problem with being able to smell the oils. Some will call for more drops than others but that is based on the fragrance of the oil. For example, I use more drops of lemon oil than lavender because the lavender has a really strong potent smell. If I put too much in I will have to turn it off more frequently because it's just too strong. Also, the diffuser has two settings. If you press the "on" button once the diffuser will run for about 30 seconds, shut off and then automatically turn back on. It will continue to do this on this setting. I don't want to assume this is what is happening with those who say it "stopped working" but it is possible. If you press that same button twice instead of once, the diffuser will run consistently until it runs out of water. I use both settings depending on how much fragrance I want or how long I want the water to last. The mist from my diffuser works perfectly fine. The other button is strictly for the lights. Sometimes I use them sometimes I don't. You can have the lights off and use just the diffuser. The "on" light stays on consistently. It is just a small red or green button depending on the mist setting so if you need complete darkness to sleep it may be a problem. I am very happy with the purchase. It does the job efficiently and is reasonably priced. The ones from the essential oil companies are twice to three times as much. I have one diffuser for the main area in the house and now a second one for the bedroom. I also think it could be used as a humidifier even without the oil. Glad I bought this.

This beautifully styled ultrasonic diffuser really pumps out the mist. Also, it has a lot of interesting features, that I have found unique to this model. If you are comparing diffusers, trying to make up your mind, here's some points you might want to consider with this model. For starters, it has a warning sound for low water level, power up, and so on. Many diffusers don't come with a measuring cup for the water, URPOWER's diffuser has one. It might seem like a small point, until you have unplugged the wire from your diffuser, to go to the sink to get water, about a 100 times. Suddenly, its the little things that make all the difference in convenience. The LED nightlight function, provides a lot of different choices, for the light's color and intensity. When you click the LIGHT button, it toggles thru 1. kaleidoscope colors, constantly morphing thru the rainbow 2. dark red 3. bright red 3. dark blue 4. bright blue 5. dark yellow, and so on, including white, until it finally turns the light back off. So you can select morphing colors, or find your favorite color, or even chose the color for some "light healing" that corresponds to the essential oil you are evaporating. (Peppermint is green, Orange oil is orange, Lavender is violet, Rose is red, Eucalyptus is blue....I'm sure you see where I'm going with this.) The power button has a start up mode, with a green indicator light, and an operational mode, with a red indicator. If the unit runs dry, it powers off. So no need to worry, what will happen if it runs out of water during the night. Nothing happens, it just turns off. Finally, the diffuser includes a clearly written, very thorough instruction booklet.. Even though it only has two buttons, the light button and the power button, people have questions about the operation, the maintenance, or like to keep handy a troubleshooting list. URPOWER is a consistently good company, with well made products, from my experience. They include a one year warranty with this model, which I'm sure they'd stand behind.

A WORD ABOUT AROMATHERAPY
I've been practicing aromatherapy for about 25 years. You start out with 6 oils, and before you know it, you have 30 different fragrances, and you're creating your own mixes to treat all kinds of illnesses of mind, body and spirit. You never want to try to diffuse those cheap "fragrance oils". Those will only create a nasty film, and gunk up your diffuser's ultrasonic ceramic disk. Only buy 100% pure essential oils, for your diffuser. Of course, any scent that you connect to, is the best scent for you. Find a health food store, or even a large supermarket with a health food section, and you'll find an aromatherapy display with tester bottles. Smell a few, then stop. The nose can only recognize a new scent, for so long. (We acclimatize to smell so fast.) If you don't live somewhere near a health food store, or you just want to delve right in, I recommend one of those "Essential oil starter kits", with 6 or 8 different oils. (These kits usually contain Lavender, Peppermint, Orange, Eucalyptus, and maybe Lemongrass or Tea Tree oil.) Personally, I might buy the Lavender, Peppermint, Orange, Eucalyptus, but add a couple of more expensive oils that are typically used for incense. For example, Myrrh, patchouli, pine, or a personal favorite, cedarwood oil. Its inexpensive, and has a lot of benefits, including being a bug repellent. If you want to use your diffuser on your back porch, and have problems with mosquitos, why not consider buying some citronella oil? Instead of orange oil, a more subtle scent is orange blossom, or even bergamot oil. (A favorite blend for headaches, is the classical version of eau de cologne, which is lavender oil 3 drops, bergamot or orange oil 3 drops, and 3 drops of rosemary oil. It rids you of headaches in a jiffy.) If you really start to get interested in the subject of aromatherapy, or even the history of perfumery, and incense, there are no shortages of books to purchase. Its like any other art form. If you start to learn to play an instrument, your ear will develop more sensitivity to sounds, to the beauty within all types of sounds, and the relationships of one note to another. The same is true of aromatherapy. In fact, musical language is used to describe the scents. A top note is the most easily detected scent, and most easily evaporated. (Like bergamot oil). The bottom note, or bass note, last the longest, and as in music, ties together all the other scents in a mix. (Patchouli and sandalwood oil, are both bottom notes.) You can just dip your toe in the water, and get a bottle of lavender oil for relaxing, and a bottle of peppermint oil for colds, or to perk up, or you can discover the amazing world of scent all around you. Best of luck on your adventure. If you have questions, just post in the comments, and I'll try to answer them for you.
I was provided a free aromatherapy diffuser in exchange for an honest review.