There's just too little space that's developed with each time you develop an area - new areas to be cleaned "pop up" almost in the exact same place you just clicked on to clean. And, you must merge lots of things together only to get one item you need to clean - it would be better if you had more storage area. Energy use concept is also kinda negative. Plus, on more than one occasion when a "new version" has come out to be downloaded, I have been unable to make it download.