I would strongly consider replacing my REI with one of those if it came in non-ninja colors.
which reminds me of another issue for the OP, consider buying a less expensive bag to start so you can figure out what features might be lacking for you. My REI doesn't have enough internal dockers and pouches for my likes (keep losing things in it) and that vertx above seems to have more than enough. I'd never know that if I hadn't been living with the REI for 6 months.