Are windows in bathrooms a selling point?

I am remodeling my home for resell and now its time for bathroom, the big question is should we put a window where one already exists or should we close it up? it would be located in the shower tub area i want to close it to get that spa feel for this very small bathroom but i'm being told i will regret closing it because it is a selling point. please any feed back would be very very helpful.