I am sitting here right now burning Firefly CLEAN Fuel Lamp Oil in my brand new Vermont Lanterns Brass "Dorset" Table Lamp (8", Antique Brass).

So far now from what I see this is a match made in heaven! :) I see and/or smell NONE of this alleged soot or smoke that I have read about by a very small number of people. I believe their problems are from improper use of this fine product. (operator error)

I will continue to order this lamp oil provided the price does not go up. (note that this was a Prime item when I ordered it, so free shipping. However looking at today's listing it does not appear to be Prime anymore and I see they tacked on a $7.77 shipping charge.) I will wait until it is Prime again because I am not willing to pay that price for it.
Firefly don't shoot yourself in the foot on shipping charges.

Things I like:

I like that this is probably the safest lamp oil on the market with regard to flash point, the temperature at which it ignites is a high 220 degrees so there is less worry about storing it in the house.
I like that this is a high mileage fuel that burns 50% longer than competing products.
I like that it is burning nicely in my lamp without any issues.
I like that I don't smell anything at all about this lamp oil, either before burning, while burning, or after burning it.

AFTERTHOUGHT:

If you are interested in using this fine lamp oil you should take some things into consideration while using it. It will arrive to you with totally no scent or detectable smell.
If you mix this lamp oil with kerosene (which you should never do) , you are messing up a good thing, it probably won't burn right, and the kerosene or other bad smells you smell will be from the kerosene, not this lamp oil.

(Then you will blame this lamp oil for the smell, and that is just WRONG!)

If you get this oil and plan to start using it you should empty out the oil lamp or lantern you are going to use it in and turn the lamp or lantern upside down on some paper towels (lamp opened, of course), for an hour or so and let all the old oil drip out of the lamp onto the absorbent towels. Then take a clean towel and wipe any remaining oil off of the lamp.

At this point if your lamp's wick has ever been used before for kerosene or even another brand of lamp oil you should replace it with a new unused wick immediately before burning this oil. (remember you don't want to smell that old kerosene, right?)

Not only that but by putting the old kerosene-laden wick back into the lamp the kerosene in the old wick will contaminate your brand new lamp oil, making for you an unpleasant experience.

If you use this lamp oil correctly, (and uncontaminated), you will have a very pleasant experience.

I go back and forth between liquid paraffin during the warmer months for the low oder and lamp oil in the Winter months at my remote cabin as it does not freeze. Liquid paraffin gels or freezes and lamp oil produces much too much oder, almost asphyxiating. Until now, I had not found any oil that will not gel up or is oder free. The firefly lamp oil produces a very faint oder, but it's really almost unnoticeable. Although it has not been cold enough to really put it through the test this year yet, the Firefly oil did stay completely liquid at 10 degrees Fahrenheit. Also, I did notice the burn times to be significantly longer than the other oils and paraffins I have used in the past and it really does burn clean. I usually end up cleaning my globes every day, but went a full seven days before I noticed a very faint white soot on the inside of the globes after I started using the Firefly clean lamp oil. I will continue to purchase Firefly clean lamp oil for lighting my cabin.

This lamp oil may be "smokeless" as it burns, but there is something else about it that is absolutely intolerable: the heat trail of the flame when it touches a surface leaves a black sooty coating. I burned this candle in my small office and noticed after a while on the ceiling above the candle a black stain. I wiped it with my finger. What a mess. I held a few inches above the flame a spoon and it was blackened in the manner described. As if that were not bad enough, I think this oil puts out something that can be breathed in because, at the risk of being gross, I noticed afterwards when blowing my nose there was some darkness in the mucous. Hmmm, what is in this stuff that allows it to burn without smoke yet produce some kind of invisible residue? The surfaces stained with this black coating are not that easy to clean, I am finding out. A very disappointing and not very pleasant experience.

My mom brought me two Dietz lanterns that were once used by her father. He used them in the winter to put in the pump house to keep the pipes from freezing. He also burned kerosene in them and over the years they became quite dirty. After he passed away, my mom used them as decorative pieces on the mantel of the fire place and they haven't been used in 40 years. They were in very good shape, for their age, and I spent some time taking them apart and cleaning them. I didn't want to restore them to "brand new" condition as I thought that the paint scuffs and other age related imperfections gave them a bit more character. After getting them functional again, I decided to use this particular fuel by Firefly in the hopes that it would be better for the lanterns instead of using kerosene. I also didn't want to deal with smoke getting everything dirty again and the smell of kerosene isn't exactly pleasant. I'm happy to say that this fuel has worked amazingly well for the old lanterns. It has no odor and only produces smoke if I start raising the wick really high. It was amazing to see the lanterns working again and as a kid, I thought that they were only non functioning decorative pieces. We probably spent a few hours in the garage this evening watching them glow and talked about our grandfather, as well as, the history of these particular lanterns. Now I'm on the hunt for another lantern that I remember seeing hanging on the wall of one of our old barns back home. If I do find it, and I can get that one fixed up again, I will definitely be using this fuel in it as well.

Does not freeze! I stuck this in the freezer for 12 hours and at 10 degrees F there were no signs of freezing or even congealing. The burn is clean, only a slight odor that is not unpleasant, similar to an unscented candle burning. I use this in Handlan and Adlake railroad lanterns. This stuff burns very slowly and emits great amount of warm light. Everything that is claimed on the label is true. Don't think about it anymore just buy. I don't know of a fuel that comes remotely close to this one, great stuff!