I bought this Glade PlugIns Scented Oil Starter Pack after moving into my new apartment. New place deserves to smell nice, doesn't it? It wasn't too expensive at a cost of about $9-10.
The warmer unit took up a bit of space, but it mostly made up for it by having two extra outlets on the side. I plugged in my phone charger into either one regularly and they worked with no problem. The warmer unit also has a system from 1 to 5 where you can adjust the smell to your own preference. I found this number system to work pretty well and with a smell like Hawaiian Breeze, my room smelled very pleasant.
However, a small little accident prevented me from using this kit again. My kitten somehow knocked over the warmer unit out of it's outlet by accident one day. The warmer unit fell on a power surger that was lying nearby and melted a part of an empty outlet, complete with smoke smell and black marks. I was lucky to catch this early and glad nothing was plugged into that outlet.
Aside from this accident, I would definetly keep using this Glade product, however I don't want to risk another smoking surger (or anything else) again. If you decide to buy it, however, make sure pets and kids stay away!