OK -- I received mine today.
I really dislike the droppers that they come with -- it's very easy to have them drop oil everywhere O_O -- but once you get the hang of using them, they are OK.
So I purchased Neroli 36, Bergamote 22, and Santal 33 oils -- I have so far tried Neroli 36 oil, which I found to be very floral / aldehydic and not as aromatic as the EDP is (I have a sample). It does seem to last though. Begamote 22 oil is great -- again, not as much of a scent cloud as the EDP, but still good enough -- and you don't have to use that much either. I am liking these a lot actually.
Unfortunately the box that Santal 33 came in leaked so I am not going to open it yet until I hear from Luckyscent...but I can smell it and it smells great, just like the EDP -- this one is probably the strongest out of all of them (which is what I would have thought). I would think that the Rose 31 oil would be of a similar strength.