Hi Ed:
Went out with my new PoGo for the first time last night, trying to call in one of the lions roaming around up here. Didn't call a lion first time out with the new caller (dang!), but I'm a happy camper nevertheless.
Easy-to-find buttons on the PoGo, so mute, volume, start/stop, or up/down one track are a snap without looking, already.
Having a gazillion tracks on the thing might be more manageable than I'd thought. The "ID3" feature scrolls whatever name I choose for the track across the display--but some need renamed for clarity since the scrolling doesn't start until the track begins playing.
Already have my single unmixed sounds grouped together: rabbits, mice, fawns and does, mountain lion vocalizations.
Your suggestion of making calling sequence mixes is a well taken, and is the next thing on my list. Easy to do in Goldwave, gotta be better than programming a playlist at the start of every stand like I was doing with my balky CD player. (Why didn't I just burn CD mixes? Would've, but needed a newer less balky CD burner, too. Decided instead to spend the bucks on the MP3. Good decision.)
Half a dozen sequences should do it for 90% of predator calling situations here.