For the record, I'm using Lexar 16 and 32 gig cards all of which say Platinum II 60x on them.
Don't know the Class. Got a deal on them and thankfully there's been no problem with any of them.
Run a max of 6 tracks configured as 3x stereo tracks so far, occasionally forgetting to disable the mix track.
Pretty sure it does show the levels on the disabled mix track.
Really digging this unit - its been flawless for me even after days of blazing all-day Colorado heat taping all my friend's mics as well as my own
Love the upgrade that lets you operate it completely from the top panel. That's key.
Only issue I've had was not getting it to sync the digi-in with skaggsies HD-P2 digi-out.
Didn't try very hard to troubleshoot though. Understand it syncs witha v3 no problem.
Could this be a "both want to be master clock" sort of situation?