I love my M7 Pro! #ProscenicRobot. I designed and printed some useful upgrades you can have. 1)"Angled dirt bin floor" so the heavy dirt goes to the back of the bin to be vacuumed out. 2)"Filter cleaner" A Vacuum attachment to clean the hepa filter. 3)"Manual dust bin cleaner" A vacuum attachment to clean the dust bin with out removing it -- until I buy the automatic one. 4)"Base holder" to keep it in one place.