We started off with a bedroom, hall & entryway…eventually to the entire house but they mostly stayed in the family room during the days. Then, Gulliver started peeing outside of his box. We tried EVERYTHING and learned from this site that sometimes its best to lock them up at night until his habits return back. We built a NIC cube area with stairs & one other level…2 litter boxes, fleece, etc. Covers 2/3 of “their bedroom” which is about 10X10′. Then, in the morning we open their door & they eventually end up in the family room where we have an under-the-bed box for their litter & hay as well as their boxes, tubes, toys, etc. SUCCESS! They are pretty tamed now…you turn off the TV in the evening & Gulliver gets up, stretches & slowly lops thru the living room, up the few steps, thru the entry way, down the hall and into their bedroom. Lainey however, first takes her laps around & behind the couch, over the hearth, behind the chairs, go…go…go…THEN down the hall to their bedroom. Our bunz won’t go on tile so the kitchen, dining room, bathrooms & 2 of the bedrooms they never approach. The rest of the house is theirs. Highly recommend it if it works out and Tansy’s habits remain good. Lainey is a digger too so she has to be watched if she doesn’t get enough run time to wear her out a bit. When we know we are going to be elsewhere, we put up a section of our xpen between the family room & living room. I’m thankful DAILY that Gulliver reacted as he did. The seem to really like their routines, including feeding time. Just love my bunz!