sleeping in the day

where do your babies sleep in the day? is it always in the same cot? i place baby to sleep sometimes in baby rocker chair or those cushiony co-sleeping small beds in living room where i can see baby. but feel baby takes long time to sleep in cot or will wake up easily in cot at night. is it not used to it? becoz keep changing sleep places? should i only stick to 1 place for baby to sleep, that is the cot? pls advise - thanks!