Hi, we used a crate for Bella when we had her, but apart from a few times, we never shut the door! Just couldnt bring ourselves to do it all night, so we put her bed in it and put it accross the door of the utility room to reduce the space for poo and wee accidents! LOL if we needed her out the way we would shut her in and she was fine with it. We get Maisie in 4 weeks and will use a crate but do the same with the door. I have read it is a very good way of toilet training but you have to be dedicated and be prepared to get up in the night to let her/him out for wee wee's. I work and wasnt LOL so we would rather have a few accidents and paper trained instead. She was pretty much house trained by 3 months old, which isnt too bad I dont think. Vigilance is the key, and use a training word for poos and wees. We say, "go wee wees" and she goes pretty much on command and knows why she is outside. Handy if its raining or snowing.