DS is almost 5 months and has been in his cot bed for a number of weeks now, but will not settle in it. He will only sleep soundly in it if he is completely zonked when he's laid down. If he wakes in the night it's easier to just keep him in our bed than battle with him to sleep in his cot.
I'm wondering if its because his cot isn't that cosy. He wears a sleeping bag as he just kicks off blankets and I've avoided using bumpers because of the suffocation risk. So there is just one small boy plonked in this vast bed with just a firm mattress and sheet 
He's quite a warm baby so lots of covers isn't an option!
Thanks