Hi Skye,
I think the pen is well turned and finished nicely.
I often find that bands like this look like they were attached to the top as simple glue joint when I see them, not too much detail and dependent on the contrast or match to make it work. I like to see these as an oppertunity to add some detail, perhaps a V groove between the pen body and the band, or some type of turned detail in the band to make it's design and purpose look like it was intentional.
In the last pen class I taught at LV in June I challenged the 7 students to some up with creative centre bands that defined a detail or added something to the look and feel of the pen. These turners all came back with designs that developed the band. Some were okay and some wee really great. I know the pens all looked better than a plain wood contasting band. Your band looks fine to me, but I see it also as a place to play/have fun and create something special in a unique pen like yours here.
Just my rambling thoughts,[
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