Great, reliable product! I definitely recommend doing a few trial runs at home (or even in the shower if you're nervous/don't feel like doing an unexpected load of laundry LOL) because there is a bit of a learning curve to finding the right angle, but once you figure it out it's super handy.
The open-top design makes it super easy to clean as well, and there's less opportunity for moisture to get trapped and get funky. I also appreciate that the design/branding isn't particularly gendered, because while I'm not looking for a hyper-realistic STP, using one heavily marketed towards cis women would be a bit dysporia-inducing.
I keep mine in a little pouch with some sheets of biodegradable toilet paper and a travel bottle of hand sanitizer, and take it with me if I know I'll be out somewhere with unreliable bathroom access! Overall a great product.