Converting a bathtub into a shower is becoming increasingly popular. Many people find it much simpler to get in and out of showers than bathtubs. You'll first need an experienced general contractor that knows their stuff and has a lot of practical expertise! 

These are some points that you need to consider if you want worry-free bathroom renovation:

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Bathtubs are equipped with a 1-1/2" drain. Showers require a two" drain to accommodate the additional water. Thus, the whole distance of the 1-1/2" bathtub drain needs to be taken off and replaced with the 2" drain. The drain will also have to be relocated. 

Fiberglass or tile shower, make sure to choose a full tile shower. A fiberglass shower usually comes with a one-year or less guarantee, and it will leak shortly afterward. It is also less sturdy and safe.

A majority of them don't come with seats, and those which do have them, are made to be used by people who are 5 years old or less! Tiled floors are more secure and drastically lower the risk of fall or slip injury (provided you select the right one!)

However, you can tile up to the ceiling for ceilings of 8' height or less. Also, make sure to tile the floor around the shower. Utilize tile as a baseboard. Do not make use of wood or MDF-type baseboards in any wet zone. It may spoil the look after its application.

Also, the standard shower heights place the shower head on your chest! It's recommended to set up an adjustable shower head mounted on a pole. It allows you to lift and lower the head of your shower to different heights, sit down to clean yourself and shave your legs more comfortably and wash the shower walls easily.