I had purchased one of these a few years ago and had many years of enjoyment from it because it seems to reduce the allergens (I know many who do not believe in the salt lamps), but it also makes a beautiful night light as an added bonus. 

This one is a substantial size!  I was not expecting it to be so large and I love it!  I added it to my kitchen and leave it on at night since I live in a remote area that is very dark at night.  It's a great addition.  I'm now trying to decide if I should also put one in the guest room!  I highly recommend this salt lamp and encourage others who have been on the fence to get one!  Thanks Wayfair!