I’ve never used or heard of Redi Trench. I’ve used Shluter-Kerdi and Laticrete and the Laticrete was way easier to work with.

Thank You so much for the information! You have definitely helped me, and many others, with your knowledge.

I ordered all my fixtures from Build.com. My plumbers swears the big box stores have lower quality valves. There are several companies that make the polystyrene, pre-formed shower pans and waterproof wall board. I looked into the Laticrete shower system while checking out HYDRO BAN liquid waterproofing membrane based on the Floor Elf’s site. I have never installed any other shower pan so I can’t compare the experience. Based on my imagination…
I like that the LATICRETE shower pan is one piece. The Shluter ones are two pieces. It seems like it would be challenging to make sure the whole pan is level and neither side sits proud to the other side because you pushed one side deeper into the thinset. It’s challenging enough get a one piece pan in place and properly seated into the mortar because there’s no access to the space. You have to lean in… I can’t imagine trying to manage getting two pieces in place, flush with each other AND level across the whole surface. I would need to actually install a Shluter shower pan though before I could give an actual comparison of ease of installation.