MantisX and TitanX helped me figure out my grip and trigger press issues in just a few days.
I started shooting a few months ago after a few decades of no shooting and quickly realized my shooting was really poor. I thought at first that range time would fix everything. It didn’t. So I bought the MantisX X3 first and did a lot of dry fire and that helped right away. A week or so later I bought the TitanX. The big advantage was not having to rack the slide every shot. So I could finish a dry fire session a lot quicker and it was more like live fire. Some people argue it’s not perfect because there’s no recoil. What I found was that using either the TitanX or X3, I could pinpoint exactly what I was doing during the trigger press that caused muzzle movement and I could fix that. My personal experience is that training without recoil is very effective, especially if you’ve had enough live fire time so you familiar with how recoil feels.