Well, the current installer is designed to have minimal size and requirements. It does use a well-tested networking core (say hello to J0hn) and our uploads and connection stability have improved greatly since the past. Also, as you said the installer size is smaller, so that increases the chances too.

Currently our tests show that the installer fails for one reason or another in between 1/20 to 1/50 cases. If you happen to experience such failure or know of someone who did, please inform us!