The only "con" to the Odyssey is that it's not "jumper friendly". Slow charge only. At least, 5,6 years ago they were. Had one in my S4, loved it. Never needed a "jump", but was warned it was a no no.
Is the Odyssey ok for Daily Driver RS6?
SOLD - 03 RS6 Avus (905355)
Current - 03 Toyota Tacoma 4x4 double cab - the YETI, lifted, winched, snorkeled, lockered, skidded, geared