Does a good job---but....
Does a good job----once you can get it to work. I was excited to get this item but it is very difficult to get the battery cover on.  It does not screw on as one might expect, you must have to fit tiny little groove into slots inside the unit.  I had to remove the casing in order to get them in.  If this were not an issue, I would give this a 5-star grade.
Rating: 2 stars