I've used a SCATT system for years for training for ISSF style shooting, 10 meter air pistol, 50 meter Free Pistol and 25 meter Standard Pistol. I find it's incredibly valuable and has helped me fight off the ravages of old age (I'm 64) and shooting better scores. I don't use it for any rifle training but that's just me. I used to shoot prone fullbore with the DCRA and wish I had known about Scatt then.
Now here's the big BUT.... I got my system, an old wired USB version, 4th hand. It had been used for a few months then sold, used for a few months then sold...... The reason is many guys buy it and do not learn what is actually measured and what the data means then figure out how to incorporate it into bettering their technique. I really hate to say it but too many SCATT systems are bought by lazy people wanting a shortcut to higher scores. They quickly get frustrated and give up. Others have the light bulb moment and get really into it. These are the ones that will have a huge improvement in their technique and score.
Scatt is used by all Olympic shooters both rifle and pistol. Not some or most but all of them. It is considered an essential part of training. For some things like learning what follow through really is and why it's so important nothing comes close to Scatt. For rifle shooters spending the winter lying on the rug dry firing is boring and there's really no feedback. You get a really good release but no real feedback on anything else. Now add Scatt in and you can spend the entire winter shooting a match every single day with no expense on ammo, no barrel wear and no noise to distract you. Family members and the cat have to learn to walk around you but tough, you put up with their annoying crap
A few years ago my hip got so bad I had to use a cane to walk 50 feet. I had hip replacement surgery and used a walker to go into my garage starting 1 week after the operation. I shot 50 meter Scatt with my Free Pistol. First day 10 shots, after a few more days 20 shots. As soon as I got an Okay from the physiotherapist I did a full 60 shots. 6 weeks after the surgery I shot a 60 shot 50 meter match at my club and won with a personal best score. First live fire in 3 months and one of my proudest moments. So I'm a big believer but it's not for everyone.