I have two towers and use them almost every winter rather than run my heat pump backup heat.
Used properly, these are fine stoves.
Its best to keep the concept in mind when using them. They are a wick device the relies on a cage around the wick being very hot to reburn the fumes so as to break them down. That does mean you will get a fume smell every time you light one so best to keep it lit once you light it. This also cuts down on wick gumming. If you allow the kerosene to dry in the wick, it takes quite a while to dissolve it out again with fresh fuel especially if all you are doing is running the heater. Its best to minimize that as well by keeping it lit once lit.
This isn't gas so these things are a breeze to fill even lit. You simply siphon in until the fuel gauge says full. This isn't propane that's going to put moisture into the air as much so if the old mouth is dry put a pot, with no plastic on it, of water on its top and it will humidify as it heats.
The stoves have very good wick control with quite a large range. They're designed to put out enough heat even on low to heat the reburner cage up enough but obviously over time as the wicks gum and get a little slower that can change. If you smell fumes, turn them up not down. Keep that cage hot.
I use mine by placing it in a low central area then regulate the heat by by my door openings. It takes a few nights to work this out but its not that hard. Because these are single point heating systems much like the old gas floor furnaces, its a good idea to use these with area heaters like small propane stoves (Heater Buddy) or milk house style electric heaters for temporarily warming up small rooms like bathrooms and bedrooms, typically mornings getting dressed times.
Now these are single point heating systems and most people are use to central heat. Make sure you know where your pipes are in your house and not forget to heat that area as well as keep in mind when augmenting your central heat, it works off its thermostat. Heat up that thermostat with a kerosene stove, it won't come on.
I get about five days out of 20 gallons of kerosene. That's about $70 at current prices or $400 a month, which is not the most economical heat out there but consistent with many other auxiliary heats depending on where one lives. I know folks who pay that much in winter for natural gas central heat. The fuel storage is very good. It has a good flash point so safer than most combustible fuels plus almost an indefinite shelf life as far as a stove application goes. That makes it excellent for a backup heating system.
Hope this helps. If you have anymore question just ask away. I've been using this for 18 years now and have been around it most of my life.
Tj