I know people have used an exercise pen successfully. It is an alternative to a crate and will keep your puppy safe when you can't keep an eye on him. It won't help with your housetraining however as it is too large. If you used a crate it would help with the housetraining .
Tara, IWS 5/17/02 -
Dante, Male Brindle 3/18/10 - Adopt 5/13/13
At the Rainbow Bridge, Markus and Terramoto