I have two auxiliary bathrooms bathrooms with standard 30x60x30 all in one fiberglass tub/shower enclosures. Both were installed with the house when it was built in 92 and are worn, yellowing, and the walls are a bit short for my taste. I'd like to replace both, but I do not have any experience doing my own tile work and am doubtful my first learning attempt will yield a positive result.

I've been looking into panel systems like Utile Maax, Kohler Choreograph, etc but it is hard to find good information about the quality of the product, actual install difficulty, and looks.

What products have you used in the past that you are pleased or displeased with? I'd rather spend more for a good system with the caveat being I need to be able to do the installation myself as I don't have the budget for hiring out the work.