I know someone who has man-made marble in a bathroom for shower surrounds and vanity tops, and beautiful white window casing and window sills of the same material. It looks great.

If the shower area is sufficiently big, I would prefer to opt for glass partition as that ensures that outside dry area does not get wet, which may happen in case of shower curtain. Having said that, I would opt for shower curtain if the shower area is small to avoid accidentally banging my elbow against the glass partition while taking shower and getting hurt.

Wow that's way too much. How would a polymer alcove come in from the main powder room door ? A comfortable moving space is around the 23-24 inches. It may be too cramped up imagining from what you have described. WC is facing towards the shower area? You may draw up the plan and share it here for better understanding. Nitin Cornerstone Designs.

Hello Radha, I don't think any independent comparison study will be available. You may go for a localised product with nano coating. BTW, almost every one uses a St Gobain, Modi toughened glass for these fixtures. Thanks, Amit Cornerstone Designs, Bangalore.