pogdaddle

I bought the new iPad. I had the 1st gen 12.9. I enjoyed swapping the SIM card between my 12.9 and 10.5 home-button iPads, without any issues. The data plan would fire up, immediately.
The new iPad seems to prefer that I move my data account to the internal SIM chip. My SIM card was not recognized in the card tray. I had to log on to my carrier account on the new iPad and transfer the data plan via the Settings > Cellular software. There was a lag of several minutes before the data became active.
The SIM card is now inactivated unless I decide to head out with the 10.5 iPad and transfer the data plan to the other device.
I would rather put the wear and tear on the SIM tray and card, than transfer the dates plan with the software.

One thing -  when the keyboard case is opened flat, to use the iPad in portrait mode, there is no suede flap, to cover the keys, as with the gen 1 and 2 keyboard. The right side, of the back of the iPad, feels like an accordion button keypad. If I lay it down on a table, I risk, getting the keys soiled with whatever is on the surface of the table. Love the face recognition. It still feels heavy.