This is a great example of making room for an element of the bathroom without having to sacrifice functionality. It can be tough to fit in a shower unit if you have a really big tub, and imagine that that is the issue here. The result, though, is a nice little shower that looks like it works just fine. One of the problems that they could have run into was having a shower that was way too small. That is one of those things you hear about when the designer looks in shock as they realize that the shower they built does not work at all for the space.