I'd say it depends on what you want to learn. If you're doing your ppl on a 172 and you're concerned about accidental spin, then go spin one of those. I'd suggest more emphasis is placed on the incipient stage of the spin in this case, though wise to have a look at a developed one too. Or if you just want the experience of watching the world rotate rapidly infront of you for a while, go and spin a fully aerobatic beastie for 5 or 6 turns.