I purchased this item for use in a dorm-size bedroom. It has worked extremely well, and I'm happy with the purchase. Of note, this dehumidifier is probably best for a bathroom, closet, or smaller bedroom. I don't think it would be very effective in a larger bedroom or similar size space.
Just to clarify, I occasionally get condensation on my windows during the winter after showering and cooking, so I really didn't need a huge dehumidifier. Within 30 minutes of plugging this thing in, there was water in the tank. It usually fills up after about 3-4 days of continuous running. It's small enough that I can sit in directly in the sill of my window to tackle the condensation. I use this in a medium-sized bedroom and it works perfectly. If I leave it in there for a few hours, the condensation on my windows is gone. It's been running for almost 3 weeks now and works like a charm!