All and all I really like this little product.  I'm using it now, so let me give you what I think are some pros and cons.  Pros- the scent of the cedar citrus is very pleasant and not overpowering.  The essential oil is a nice oil.  I think it's low key and attractive.  The bottle is refillable  You can hang it in places other than a car. Cons- The attachment is a little awkward.  Occasionally, you have to turn the bottle upside down for a few minutes to get the scent saturated into the lid; the lazier part of me would prefer not to do that.  Advice- Don't do what I did. I tried putting an alternate scented liquid in my bottle when it was empty.  It didn't saturate into the wood like the oil did and I ended up emptying that liquid out.  Ooops!