I am not a fan of plastic cages, so I bought this here. I had the predecessor cage, however, who held only one year, because he was not painted on the removable bottom panel. This caused of course mean that the wood has been broken by the moisture. Since Half no litter and newsprint. The but here has a coating in the basin and this works very well. Since I have two guinea pigs, I have adapted to the cage according to my needs. The third floor and the ramp I have not installed. On the first floor of the guinea pigs can jump up. The edges of the floor I have removed and filed down to avoid injury. Furthermore, I have a column built in the middle of the floor so that it can withstand even two guinea pigs (Would it anyway .. but better safe than sorry). The front wall can be pulled out so that the guinea pigs can easily roll off the cage in the room. What they are doing very much and always exploit. For guinea pigs with discharge option so the ideals cage (provided you with little effort and little trifles craftsmanship can adapt). The cage also has been gnawed virtually hardly what I had initially feared yes. All in all a very nice cage. Eben also guinea pigs :)