I downloaded and used the search tool bar when it first came out (and even got bonus miles for it)...but miles for searches did not post reliably and the toolbar itself seemed flukey to me. I no longer have it installed.

I will use M+ shopping mall when it makes sense (bonus promotions, etc) but Chase UR points post quicker, more reliably, and it has better earning rates than M+ on almost all stores...and Chase UR transfers to M+ 1:1 basis, plus annual kicker.