I bought this from amazon.com on May 29 2010 - when received, I liked everything about it accept for the fact it is almost impossible to read the date as it is very small size.  However, it first stopped working after 3 months - I got battery changed and it started working - same thing happened again in December - I got battery changed again and here I am in Feb 2011 and it has stopped working.  May be I got a bad piece but we don't like to spend money to get poor quality controlled products.