Has anyone had any experience with the Medisana Blood Pressure Monitors that are sold at Target stores? Also I see that Omron is a very popular brand. Is it very accurate?

I have never heard of Medisana monitors...(with apologies to any Medisana users out there!)

The June 03 issue of Consumer Reports did an article on BP monitors, and highly recommend the auto-inflate arm-cuff, digital read-out ones by:
OMRON, LIFESOURCE, LUMISCOPE or RELiON AUTOMATIC... which is made by Omron (sold by Walmart). You probably can't go wrong with any one of those.
OMRON seems to be the gold standard, or at least the best known.