Product review (5 stars): OUTSTANDING machine, best ever for me, but NOT FOR EVERYONE!
Amazing, beautiful piece of absolutely useful technology.  I cannot praise this machine too highly... for my uses.  Your mileage may vary, so be clear on how and why this machine is so useful, and why many people love it so much and so overwhelmingly.
First off, you probably will not be very happy with it if it is your sole machine and you have a large family or a lot of dirty, greasy clothes (like a mechanic or farmer or such).  I live on a farm, which means I get muddy, greasy, do lots of carpentry, get covered with weird chemicals and such, and I DO NOT use this machine for those types of loads.  I have another old conventional washer that I do that stuff in to save my baby LG from having to deal with such uncouth, loutish elements. :)  At the price of this machine, I don't want to stress it too much!
Seriously, this machine is best for small families, apartment dwellers (ventless and 110V), empty-nest retirees, etc. But it cleans very well, leaves the clothes beautifully supple and "finished," and does so quietly and at any time I choose to have the load done.  And no changing out loads, washer to dryer!  And it's an extremely cheerful little wonder!  Makes me smile every time it plays its little tunes.
Ok, you probably won't be happy with the machine if you don't match the guidelines above, but there are some setup and operational guidelines that, if not understood, will also cause you problems with the drying portion.  First, understand that this machine doesn't blast incredibly hot, cloth-destroying, costly air through the tumbling clothes in order to dry.  It uses a much more refined process that WILL dry your clothes, and WILL save you a boatload of money, but ONLY if you make sure that you set it up and use it correctly.
1) I can't stress enough the importance of not overloading the machine during drying.  I weigh every load and NEVER load more than seven pounds of clothes - that's around half a load of dry towels, or somewhat less of things like jeans.  Since I sussed to this and started weighing my loads, I've NEVER had a load that wouldn't dry on the MORE DRY setting (I use that setting for everything EXCEPT small loads.  Word to the wise.)
2) When I first received the machine, it would not dry a load, no matter how long I let the dryer run.  Puzzling.  I had the drain hose running UP to a drain standpipe like you find for conventional washing machines.  Fortunately I have another drain at floor level (the machine is in a barn my father built, and I have no idea why he had two drains there).  On a lark I moved the drain hose to the floor-level drain and WHAM! my clothes came out dry every time.
Oh, the humidity thing... I think that it does raise the humidity some in the immediate vicinity.  Mine is in an open area, so I can't swear to it, but it stands to reason that, if you have it draining into an open drain, some of the moisture might aerosolize or just mist back up into the room.  Probably best to have it in a place with some airflow - after all, it's not like it makes a racket and needs to be hidden from polite company.
Another word to the wise: You hear it over and over and for things like appliances you never do it... well, people, READ THE MANUAL.  You will NOT be sorry, especially when strange symbols like "O" or "I E" begin appearing on the screen (O means its time to run the tub-cleaning cycle.  I'll let you discover the wonderful world of I E yourself... and no, it doesn't mean fire up Internet Explorer).  If there is ONE key to unconditional love for this machine, it is understanding its foibles and idiosyncrasies.  You husbands out there will understand... :)
In summary, just let me say that you'd BETTER NOT come around and try to take away my LG! :)

Peace, hope this helps...