Yes that is where I got mine from as well.
Personally, I am very picky about quality of power supplies, so I spent a little extra and purchased my own Mean Well from Mouser (IIRC).
I use an EMMC for the OS as they are much faster than SD cards. I picked up a 64 GB “just to be on the safe side” but honestly it’s probably overkill. Do note there are different flavors. You want the Linux one. It comes with Ubuntu I think but I wipe that and put Armbian instead.
Do note that you will need to flash the bootloader on the EMMC, which is in a special hidden partition. This is easy though, just burn Armbian image to SD card, boot once with it, execute nand-sata-install script, install os to EMMC, then copy special bootloader. Both of those are options in the nand-sata-install script which is a curses based menu.
Also note there is a physical switch to select boot from either sd card or EMMC. Power down, put switch to EMMC, remove SD card and enjoy freedom, speed, stability, and the entire regular Debian software repository.