I wanted one of those so bad many moons ago when I was a teenager -- the ads were very inticing; never did get one.
Got myself a Ruger "single-6" pistol which is now (gulp) about 45 years old....my older brother got me a Ruger .22 rifle, but that is a piece a crap - have had that one for close to 40 years, and never have been able to fix the load/jam prob.
I have a single six .22/.22mag....great fun!
I have also two Ruger 10/22’s...
Never a jam in 15 years and real tack drivers. My favorite squirrel stoppers.