Bathrooms- tile or shower stall for moderate apartment rental

[Kim Boyd]

I just purchased a 3 bedroom rental apartment and it has the little square tiles. And they are a MESS!  the mold and mildew in there is terrible- hence I got a good deal on the place :) . Anyway.... Should I install bigger, updated tiles for the shower and risk the mold mildew grout issue or just install a prefab, fiberglass shower stall?  The stall seems more durable and easier to keep clean but the tiles are more updated.  Opinions?