As cute as it is.... No I wouldn't allow my pet to sleep with me.
It can make a pet very much reliant on you for all their comforts.By that I mean they would have you in their sight 24 hours a day.
That alone is not good for any pet, they are like children and need to have their own little bit of independence.
Some of the best animal trainers here and overseas recommend that we must be the 'top-dog' as it were.We set rules, and pets follow and understand and comply in love.
By allowing a pet to be so close (on our bed) when sleeping gives mixed signals.That they are equals to us, nothing is more further from the truth.
I do understand they are sweet and cute and yes, part of the family.
With every good family there is structure, and so it should be with pets.
They should be obedient, and at no time assume they can do as they wish.