Product review (3 stars): Cool machine but one major flaw (at least on mine.)
Let me first say this machine cleans and dries my clothes amazingly. Most loads, with the drum 75% full, are totally dried in under 3 hours. I use the low temp drying because otherwise this will shrink my clothes! Clothes come out warm and totally dry. I did cut down my wall stand pipe and I have the unit on a pedestal. I do not think a floor drain is necessary, but it is possible that the drain hose routing is critical. Make SURE the exit of the drain hose on the machine is the highest point on that hose's route to your drain pipe. Otherwise it is possible water will flow back down towards the machine and cause some of the drying issues. I don't think it is necessary that the hose always is routed downward, it just cannot have a higher point than the machine's outlet. I should note I am in Colorado, where the air is very dry, and I think this probably aids in the drying.

So, my clothes are clean and dry, and no need for a dryer vent. It is also clear this uses very little water. That makes me happy.

Here is what makes me unhappy. In order of priority.

1. There is a small vent near the water hose connections on the rear that emits steam while in the dry cycle. Enough such that condensation is all over my wall and water drips on the floor. LG service is absolutely horrible - 2 people have said nothing should be coming out, 2 people have said it is normal including the tech they sent. (I'm not sure the tech had ever worked on a machine like this...) From what I can find online, the vent should have a check valve on it to let air in, but not OUT, such as during drying.) So LG came out and said it is normal, but I don't know what the truth is at this point. Ridiculous for a machine this expensive! I will update this review as I find out more. In the meantime this is going to mess my wall up due to water damage if I don't find a solution.

2. There is a HORRIBLE smell coming out of this thing for the first 6-8 dry cycles. Run some old towels or something. Not clothes you care about! It will go away, but until it does the smell will get on whatever you run through it. The manual states "odor" in troubleshooting, and the answer is "new machine." But it should be more explicit. Do not run clothes you care about, they will be ruined.

3. The "cute" sounds and songs it makes are actually terribly annoying, and there is no way to turn them off. The cycle finished song is absurdly long.

Anyway, I can get past all of this except the steam coming out the back. If I can easily fix that I will say 4 stars. Until then this machine is meh with some distinct annoyance at the price, considering the issues.