Didn't like the bypass on the 6, it coloured my sound but if you are not going to turn it off it was a great bit of kit.
Using a Zoom b2.1u at the moment which although doesn't have as much functionality as the 6 (you can only scroll through patches as opposed to being able to turn effects on and off in a patch with the 6) its a great peice of kit that is easy to set up