We have a huge garden tub in ours that is never used, and a small walk-in shower stall. The dogs have taken more baths than we have in that tub. I'd like to rip out the stall and the tub, replace the tub with a big walk-in shower, and put an open storage space where the stall is, since storage is really what we're lacking. I think if I do it, I'd use one of the enamel shower floor inserts and tile the walls because its less aggravation than presloping the floor, I can reuse the drain location, and I like the contrast vs. the tiled floors. The only tricky part is that there is an exterior sliding window in the stall, and I'm not sure exactly how to waterproof it. I don't want to block it off because its the only natural light in the bathroom, and would have a mismatched siding patch on the exterior because its sun faded.