I use both. They're essential for me when trying to set up business with sites. I'll pass on sites that have a crappy ranking when looking for traffic and focus on the bigger ones--at least until I run out of whales. So far, though, whales are still in season
I run both toolbars on one browser and use the other when things start to get clunky, as they often do. There has to be a better way to work them, though, as sometimes it makes browser almost unusable.