Backing out on a splint

Anyone have good experience with the urbanek splint? I paid for one and waiting for it to come in, but I’m having crazy levels of concern. As I’ve waited and wondered I see reviews of it permanently changing people’s bite and that it causes molar eruption and anterior open bite.

I really don’t want to have to get extensive orthodontic work in the future and still be out the entire $1900.

Some people say he asks for good reviews and makes people post them, but at the same time I know people will write reviews when they’re angry.

I just don’t know what to do and don’t want to turn down a chance at relief, but also don’t wanna potentially ruin my teeth