Three coats with SV.
The formula on Jack O is perfect -- on the thinner side of perfect, if that makes sense, though I think that's due to its satin-y finish. You don't have to work too quickly when applying the polish because it just glides on the nail. I haven't tried out any of my OCCs in the new bottles, but Jack O is in the older bottle with an older brush, which reminded me a little bit of a thinner Essie brush. I recommend using three coats; you can get it opaque in two, but you get more color depth with three. This dried OK with SV; HOWEVER, it's still a little tacky after approximately half an hour. I don't mind that because I usually put on a DVD or surf the internet while I'm letting a mani dry, but I know some people aren't into that or aren't willing to wait that long.
According to the OCC site, the brand is 100% vegan and cruelty-free, which is really cool if that's something that's important to you. I say that because most of us polish aficionadas tend to be equal opportunity buyers and collectors -- sort of like how non-B3F polishes continue to have tons of appeal for us.
I can't find any information about when this polish was released, so I'm guessing it was either limited edition or discontinued last year. If you're interested in checking out OCC's other polishes and products (lip tars are what they seem to be best known for making), you can peruse their site. Polishes are $8 USD each. I bought this on sale in December (I *think*) when OCC was changing to their newer, current bottles.
I don't think I'll be keeping Jack O -- as wonderful as the formula and application were, I don't know that I would reach for it again. Also, it might be better on someone whose skin tone isn't quite so yellow. I guess I should stick to true oranges and slightly redder oranges. Ah, well.
What do you think of Jack O? Is it NOT the perfect pumpkin shade? (I dare you to find one that's better.) Are you getting excited for fall, too? You know I am, but at the same time, I feel like Costco could have waited a little longer to put out the Halloween stuff. I don't need to be seeing kids' Halloween costumes at the end of July, smh. Let me have my summer!