I purchased this because I've been using the Glow and Embrace wax cubes and sprays in my home for about two years now. I was stoked to find these plug-ins and happy to pay the price because I truly love Glow, Embrace, and now Calm after smelling it.
However, I've run into many of the same issues other users mentioned. First, it's too heavy and bulky for older home outlets. Older homes often don't have grounded outlets, and the size and weight of this plug-in make it hard to use in the spaces where I actually need it. It also wouldn't fit in the outlet I bought it for because I have a 3-plug extender in the bottom outlet, and this simply wouldn't go in — and those outlets are already being used for important things.
Second, unlike the wax cubes, this plug-in doesn't permeate my home. Two wax cubes will make my entire house smell amazing, but two of these in separate rooms barely make a difference. I have the nose of a bloodhound and I can barely smell these unless I'm directly next to them.
Another issue: there are no refills. Are we really expected to buy a whole new plug-in every 30 days? That's not economical, and it's definitely not environmentally friendly. This creates unnecessary waste and makes the product far more cumbersome to keep using.
Also, why is Embrace hardly available anymore? It's the best scent for people who are sensitive to strong smells, and now it's almost impossible to find.
I love these scents, but the bulky design, lack of refills, and poor scent throw make the plug-in version hard to recommend.