I agree.
I've used them plenty over the years on cars/trucks I planned to sell, not keep long-term.
I've had buddy's that had them fly off at highway speed. Worst one was a "flapper", and all it did was leave a nice scuff around the front fender wheel lip.
Like I said earlier, It's all in the install. And I usually use a dab of rubber cement here and there to help keep them on. Them as soon as they're installed and cemented, I lay them face down on cardboard overnight to help the drying.
And as I said, it's not a 10yr solution, but I usually buy a set of 4, good, but used radials for around $60.-ish bucks, a set of new portawalls, and if I get a summer out of them, cool.
Still cheaper than 700+ for new radials. And I seem to have a problem keeping vehicles for long. I'm looking for a specialist to treat it
And BTW, the black 59 wagon had that same set of portawalls on it for almost 2 years. Granted, the radial sidewall had grooves, but they more than paid for themselves.