The mobile edition offers schedule and fare lookups and contact numbers. The two main functions, Schedules and Fares are very similar and use a "wizard" interface. On the first screen you choose your start point from a drop down and click Next. A second screen prompts for destination station and for travel date and time which both default to current. Results are on a third screen. The wizard interface is intuitive and works well for this sort of data entry.
Unfortunately. Thalys.mobi has a couple of completely unnecessary and annoying usability issues.