The stick is resisting some recessions here not U3-capable. It is neither appropriate software on the stick nor the U3 installer from Sandisk website can start, they always breaks off with an error message ("Stick non-U3 compatible").
The read and write rates could be better, but the drive is 16GB but priced very reasonably priced. One can just not have it all. With hwtest 1.4 (100 MB) tested:
Writing about 4 MB / s
Read about 16 MB / s