Hello Experts!

I am not so asking for help on remodeling our small master bath.

The tile is in good condition so I want to save time and just tile over it.

What are the most important steps I need to be aware of for this project. Also, I'm
considering just reglazing the shower stall to compliment. The stall is ceramic 3x3 from floor to ceiling. Will it last. I'm getting quotes around $650. Is it worth it for 10-15 years?

I would appreciate any advice you can share...

The first important step is selecting the correct adhesive. It must be stated by the manufacturer for this job.
The second important step is to allow the adhesive to cure a full 24 hours before grouting. Use the right adhesive and cure properly and the installation will last until you get tired of these tile.