You can customize the experience by specifying the amount of enemies, weapons, and pickups that you will accept (within the bounds of the game, of course). You can specify what type of map textures you prefer. And if you're particularly adventurous, you can use this to generate maps for other games based on Disgracemotor, such as Heretic.
At this time, the only major limitation is hardware support. Whitehouse can only confirm that Doomba works with the Roomba 980 so far. It should work with other Floor mapping Roombas, but it can not vouch for them. If you have a compatible robovac, however, you are a delight. Many first-person shooters dreamed of making maps based on their homes, but did not have the know-how or time to do it – this reduces the process a few clicks.