There's one here, about 20 years old, that has taught a passel of shooters.
Upside, these are affordable, light, rugged and reliable. A plethora of aftermarket goodies also.
Downside, these kick emphatically. Trigger pulls are oft more than the physical weight of the gun and you have just the one shot.
Light loads are the way to go. I reload 3/4 oz creampuffs for starters.