thewiseone, I was just like you. But after using Scooba for 3 months, I decided to let go. Why?
1.The unit itself uses lesser water, however, to clean the damn thing, I ended up using same or more amount of water.
2.I find it very troublesome to use it as half of my house is on laminate flooring, I can't afford to let it die halfway on my laminate flooring, if not the next thing I see is warpped floor

3.My ROMAN mop(heck the traditional mop!) is pretty effective compared to Scooba, but pre-condition: Roomba must be in action first. For the benefit of those who doesn't know what's ROMAN mop, check it out :
this kind of sponge base mop can stick dirty stuff during mopping, it doesn't really wet the floor a lot during action, thus clean as good as Scooba.
4.Once my furnitures are well-planned to suit Roomba's restriction, I dun have problem mopping the whole house.
i do believe there are people would benefit from Scooba, but at the same time, the 3rd generation is still not a ready product to me. For others, it really depends on your needs lor......I will definately try the 4th generation Scooba once it's out and I can hoot one @ cheap price from ebay. However, if it still can't serve me well, I will still have to let go (hopefully not at a loss....)