Well, I believe you were true : to my opinion, Canola isn't a very good image viewer too ...

Frankly, Quiver amazes me.

When you try it, take some time to check all the settings, to be sure you use it at its best.

It's not extremely finger friendly, you will use + & - and Fullscreen buttons a lot, you will have to double tap to see a picture in fullscreen and go back to thumbnails, but it's the only bad point of this viewer.