That's one of my all-time favorite albums! And I would agree about JA being a great American band. I still have my vinyl versions of pretty much everything, too. B-)
It's hard for me to listen to them objectively since I've been a fan for so long, but I suspect that for a newbie to their music, they might sound a bit dated. Maybe that's why they're not usually mentioned in the top tier of rock bands.
BTW, the new series of CD reissues have been great - particularly this album. Did you notice the nice instrumental version of "Young Girl Sunday Blues" that starts at about 2:40 into the last track? (assuming you have the CD)