I use that but it's a bit of a mixed bag. Works pretty well in general but sometimes it's just incredibly slow, or decides to display a portait image with 100%

I use that but it's a bit of a mixed bag. Works pretty well in general but sometimes it's just incredibly slow, or decides to display a portait image with 100% width in a half-height view, spanning half a dozen screenfuls, instead of doing something reasonable like resizing so that both dimensions fit.