Veranda Estate Homes & Interiors I am not sure what sealer is used, that is up to our tile setter based on the material. The high gloss shouldn't make it slippery but I do not know if you would be happy with the overall look.
Veranda Estate Homes & Interiors I know our personal shower is a bit larger than this and I usually shower with 1 head and two body sprays on at a time. A smaller shower will always warm up faster than a larger once since it is a smaller space to heat...but that being said I don't think I will ever have a shower smaller than 4' x 5', anything smaller just feels too cramped for a master bathroom in my opinion.
Veranda Estate Homes & Interiors ^^is correct. We have the glass special made for each shower. This was a 10mm frame-less glass, if you contact your local glass/mirror shop they will be able to assist you.
Making the walk in closet into a shower requires filling the space with more functional convenience such as dual showers with body spray, tankless water heater to provide increased hot water use, built in seatand hand sprayer, shampoo shelf within reach of seat, water sealed can lighting. All of which increases the cost of fixtures, material and labor.