
No one knows as being crosses you have no idea what the mix is, and even if you do you don't know which breeds traits are uppermost.
If your requirements from a dog are fairly broad and forgiving, not minding if the dog is likely to be very energetic or a couch potatoe, big or small etc, in other words a total suprise package then a cross is likely to suit.
If your the type of family that has been happy to ahve very different types of dogs with very different cahracter traits then you won't mind how the pup turns out.
It would help if you knew that the parents were of good health, sound and of good temper.
I personally prefer my dogs to be of more predicatable type and disposition.