AA,
I have had the Cigar Oasis now for about 2 years. I have the original one and yes, it is very good. When you first get it, I recommend a few things.
First, check it constantly to make sure its not running constantly.
The factory setting should be at 70%+/-, mine for some reason came stock set at 75% and the damn thing ran ran ran all day. Next, make sure you are putting it in a humi that has proven to have a good seal. If not, that Oasis will run all day and night until its dry. Make sure you put it in a humi that has ample space because it does take up some room.
The only drawback to the old ones ($83.95 model) is that you have to buy the recharge tanks once the other one dries out. Now they say you can refill it once with distilled water, but I don't know. I tried it once and the Oasis seemed to put out a peculiar smell in the humi, so I ditched the old tank and bought a new one.
The new Cigar Oasis II is supposed to run strictly on distilled water and 50/50 solution I think. I haven't seen one yet but have heard about them. If you have $100 burning a hole in your pocket, jump all over it.
-Justin