For popin your Brisket cherry I'd think you did just fine. By appearance I'd say the smoke ring is nice, the bark cold be slightly more developed & moisture looks good. For me It would have needed to go a little longer, that slice looks a might tight. Did it probe tender??? Really all that means nothing since the proof is in the eating, what really matters it what you and your hoard of eaters thought. Hows the catfishin in lake Grenada this fall??