Wideband Accuracy? Which ones work the best?

There are quite a few Wideband sensor tools on the market. Which ones have, and seem to have the best reputation for being the most accurate?
Any comparisons?

I have the Dynojet Wideband Commander (http://www.widebandcommander.com) and recently asked Dynojet about the accuracy compared to the wideband sensors on their chassis dynos. They told me that if you sampled from the same location, the two sensors should indicate within .1 of each other.

I'm very happy with my wideband setup. Install was easy, it's got logging capability and came with the gauge. It's a little more pricey than some, but the extra features make it worth it for me.

Thanks.
But what about Dyno vs Street. WOnt the street useage of this tool show a leaner mixture as you are pulluing longer and you are oging through 3 gears, and theres a million other little things I am sure.