I'm still at the stage of being annoyed with apvlv because it's different from zathura, but that's neither here nor there. I'll try using it for a few days.
However, I've noticed that zathura has some gaps: visual mode, great idea, doesn't actually work yet; counts, ditto. One thing it does have that apvlv doesn't seem to is f to follow internal links (not sure about actual links to the web). On the other hand, when I opened the draft Salix Guide, apvlv bypasses the first page and goes to a list of the document's parts, rather like the left-hand frame you get in evince. As you can see, I'm still finding my feet with it!
I haven't actually used apvlv that much yet, but my impression is that it is quite as much a work in progress asZathura, i.e. the feature set is patchy and patchily implemented. One thing I haven't investigated yet that could leave me with a stronger preference is how configurable it is.
First time round, the slackbuild failed with a message about cmake. When I installed this, it worked.
I can't remember for sure, but I think I also had trouble getting zathura to display two facing pages, i.e. like an actual book. The layout of some documents means they are much easier to read like that, and it is possible in evince.
An unrelated point is that as far as I can see, there's no way of configuring where vimprobable puts downloaded files. The ability to change it in vimprobablerc would be an acceptable second best (for me) to being asked each time. In Jumanji, I can't make JRD's script (which calls zenity to ask the user where to put the file) work with ratpoison, but the location is still easily configurable.