Simple, fuss-free. Used Chrome to book tickets in 2012 and the site loaded quickly without errors.
Layout is clean, and it is clear that the parent company Singapore Airlines has not spared the change when it came to web layout and interface.
Package components were easily added and dropped via pull-down menus and transaction done painlessly with the confirmation email sent within minutes.
The key gripe is that that it failed the Amex test... which is disappointing considering who the parent company is.
Scoot-Biz was very comfortable (table was a tad small but I could easily stand between seats. Much akin to economy +)