New user here!
I have purchased a V2 and updated the BIOS to the 1.0.3 XTIDE V20 version. Found the same EGA/VGA quirks as others in this thread and intend to do some more testing over the next few weeks.
For something completely useless, I have managed to get a vintage LS120 floppy drive going using an IDE to USB adapter. It reads/writes to LS120 disks with the occasional write error that I am putting down to old equipment of suspect heritage, and it reads 1.44MB floppies OK but haven't tried writing to them. If I change the disk in the drive, I have to reboot the Book to get it to recognise the new disk.
I am keen to get the Book to read real floppies so will see if I can pick up an ISA floppy controller.
I have had trouble getting the USB port to read USB sticks, and so far, have only managed to read a 256MB micro SD card in a USB card reader. Finding a small USB stick (<2GB) is a bit of a challenge nowadays
Next device to check is the USB IOMega ZIP drive...will report back on how that goes.