Our apartment is on one level and all wood floors. In general, I vacuum once per week. Now that the weather is nice, we constantly have the windows open and I notice that the floor is a bit dusty and needs to be vacuumed more often. There is also construction right in front of our building, so it is adding to the dust. We've been considering getting a Roomba type vacuum. Do you use one? Do you think it is worth the cost? How often do you use it? If you have a non-Roomba brand, which brand did you buy? Any tips on using one? Thanks!