Ok!
I got mine and ive tried it out a bit.
I tested a few games and demos on c64, seems to work fine.
I tested a few games and demos on vic20, seems to work fine.
I tested it in the Plus4, it does not fit! =P
I need to get a userport-extender to use it with Plus4.
Ive used Victracker on vic20 from a d64 on the uk1541.
Victracker does not load/save to a sd2iec, but seems to work on uk1541.
However when i checked this morning, ONE of the files i saved on the uk1541 was zero bytes.
Dunno of this is a fault in uk1541 or a bug in victracker.