I just finished it! Well I still need to make a ramp to the "3rd" floor loft but my boys are lovin' it so far. The tunnel ramp is very secure because it is chained into place. I can open the top on the "L" for cleaning.
Not at all! The tube is the large size and it states it is larges enough for Guinea's. It's 15" diameter. They love it and use it to hide as well as get to the upper level.