see dvddebate.com. michaeldvd.com.au might have a review for the R4 version (vaguely remember reading Buffy reviews before but can't remember what season), but it's down at the moment so I can't check.
The R2 version was released in the Uk this week, so R2 Project is the most likely place to see a review.
The R4 version is released on June 5, so Michael D's site may not have had a change to review the season yet.
I just got my set in the mail, and wow, do I love this packaging! With every other set, I prefer keepcases, but this book-style packaging is great. It feels very solid. I may have to grab S3 as well.
I can't comment on the video quality, as my player isn't the best. Hopefully an upgrade will take care of that...