Good catch on the boots.
I thought these two final episodes were mostly good, but certainly not perfect (a Chuck tradition by now, I suppose). I'm not sure how I feel about the ending right now; don't love it, don't hate it. But with any series you've followed for a long time and have had any affection for, expectations can't help but go up knowing that THIS WILL BE THE END. It's as if the ending will have the burden of answering for and summing up all that came before it, good and bad. It's probably bound to disappoint to some degree, no matter what.
I liked all the "looking back" aspects, especially with Sarah looking back at her video logs. A contrivance perhaps, but I wish there were even more of those.** I liked the fact that they gave some of the longstanding Buy More worker dweebs some actual dialog. Classy final touch to expand their roles a bit, and it was nice to finally hear some of them speak (or speak again - some may have already spoken once or twice before).
With the wrap up of this series, the thing I've most enjoyed about Chuck is the ensemble of actors. I think they were all very good, from top to bottom.
** Yvonne Strahovski never coasts