Look & feel very nice!
The page is consistenly waaaaay slower to load the app on Chrome 61 ([Load] Took 11550 ms to load the app) than Firefox 55 ([Load] Took 2535 ms to load the app) because Firefox serves it cached and somehow Chrome doesn’t. It also misses Cloudfront cache in every request (x-cache:Miss from cloudfront) so something is probably missing there.
Looks like the files are not minified and gzip is not enabled either, that should go a long way to make the download of the JS files faster.