Since he kept grabbing for the spoon, I let him have at it! I would have to say, all in all, he did really well. He dips his spoon into the jar, then puts it directly into his mouth. I guess his downfall would be keeping the spoon straight; so far, half of his spooned food ends up on his tray.
Here's a nice pic after he fed himself. Hard to see all the food, but he somehow managed to get food on his face, hands, tray and....hair. Lovely.