Unfortunately, Lexar has released quite embellished product images, so you should not expect too much from the USB adapter. What looks high quality finish on the pictures, is in reality a cheap white (not silver) plastic with sharp ridges. The adapter has neither an ejection mechanism (push to eject) yet he has a meaningful insertion-limiting, so you can insert the card very deep and then only extremely difficult with long fingernails (if you which has) has to fumble out. 1 Star.
In my tests, this adapter slightly faster (approximately 10 MB / s) showed as an SD adapter in the SD slot of my MacBook Pro Retina (Late 2013).