The people who say it does not have high sucking power have not cleaned or replaced the INNER filter. I have a very hard time believing that right out of the box someone would say that. It's an amazingly versatile device that can be brought to every corner of the house and I have had it for 3 years without any problems so far. Just need to wash the outer filter, and dust the inner one - don't even need replacements unless it's damaged. Very happy with it.