Great cover band but please no one say their renditions are better than Chicago’s originals, not even close.
What are your criteria?
I first - and pretty much only - heard Chicago on vinyl with my brother, when we were young.
I think Leonid and Friends are spot-on with what I heard; and my husband, who is younger and has heard a lot of the digital, also thinks they’re practically perfect.
So, there...
IMHO the best concert video you’ll find on YouTube is the 1970 Chicago Tanglewood concert.