I think it would depend on the situation or hunt. I think onx and huntview still has some features beyond what these maps offer. Mulitday back country hunting, I will carry just this based on its muliti use and 4 day battery. Less extreme hunts, I may stick with my Oregon with a hunt chip.
I have with the app version. But not yet with the device version. It's the exact same files so I'm sure it's fine. In fact I found my survey corner marker with the app. I'm working a trade show out of town right now but will check it when I get home with known boundaries.
Well - some more screen shots from today. Game Units and Parcel data right on the unit! I was able to select which state I wanted and then just synced the device...