One of the most important things you have to consider while creating shower unit for your bathroom is the space available so that it can comfortably and neatly fit into the bathroom. You should take exact measurements of what all should be included in the bathroom including shower cubicle, sink, cistern and toilet. You should make sure that there is enough gap between each item so that you may stand at the sink comfortably and do not get bumped onto the toilet seat.
Second thing you have to consider is the place where your cubicle door will be there. Make sure that you can open it easily without knocking it against the toilet or the sink. By considering all these things, you will be able to create a perfect shower unit in your bathroom which will be very comfortable and easy going for you.