the "brand new escom drive" is essentially a pc panasonic 1,44MB drive. if you have a commodore a1200, you will have at least to short the 2` and 34` pins together to make such a drive working in your system. If you have escom a1200, you do not need to do anything.
Now as to problems: there are several non-dos games refusing to work with such a drive. there is no solution for it, as the wire i mentioned makes the problem, and without this wire your amiga won`t see diskchanges (will always think the disk is in, even if it`s not).
to remove this issue in escom a1200 you need standard amiga drive (ie. the one from a600 or c=a1200, the a500 one won`t fit most propably). before you connect it, remove the motherboard out of the case and look at the other side. on the floppy connector pins there should be a wire i mentioned it. remove it. put the drive in and have fun...