How are they?
I'm in California -- I love the konbinis in Japan, and while 7-Eleven's recent announcements to offer more konbini-like food and experience sounds great, I fear it's going to fall far short of the mark because I think it's a combination of ingredients, supply chain, and employee processes and practices. Like, all those things need to be on point to deliver a quality onigiri or egg salad sandwich, and I don't have a whole lot of confidence in the US-based 7-Elevens to deliver without massive changes.
(And to be clear, I don't think there has been any mention of onigiri appearing at US-based 7-Eleven, they have have announced better/different prepared sandwich offerings)