@chaley,
Another

for the full-width Comments
As this release features the Details page quite a bit I thought I'd add a couple of thoughts:
- Before the full-width Comments option was available I renamed the labels for a couple of my custom columns to try and reduce the width of the label column to maximise the width for the actual values. I noticed that the new labels were only used for books sent after the label change in calibre. Existing books still displayed the old labels so I didn't gain anything. Is this inevitable or is there a way to update them all, other than resending all books?
- This would be a nice-to-have if your To-do list ever gets low
. When I'm browsing for my next read the most important metadata to me is the Comments. As this is a long way down the page (at least on my phone) I've often thought that it would be handy to 'promote' the Comments to be the first field shown (after the cover), so I don't need to scroll down for every book. I'm not sure what determines the current field sequence on the Details page but the ability for user configuration would be nice, including the ability to exclude some fields, e.g. some of my custom columns are only useful in main calibre not on the reading device.