Jakob Nielsen has an article about usability of websites on mobile devices:

The Mobile User Experience Is Miserable
The phrase “mobile usability” is pretty much an oxymoron. It’s neither easy nor pleasant to use the Web on mobile devices. Observing user suffering during our sessions reminded us of the very first usability studies we did with traditional websites in 1994. It was that bad.In our mobile studies, the average success rate was 59%, which is admittedly higher than success rates in the 1990s, but substantially lower than the roughly 80% success rate when testing websites on a regular PC today.

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Mobile Sites Beat Full Sites
When our test participants used sites that were designed specifically for mobile devices, their success rate averaged 64%, which is substantially higher than the 53% recorded for using “full” sites — that is, the same sites that desktop users see.Improving user performance by 1/5 is reason enough to create mobile-optimized sites. Such sites were also more pleasant to use and thus received higher subjective satisfaction ratings. This fact offers an additional rationale: When users are successful and satisfied, they’re likely to come back. So, if mobile use is important to your Internet strategy, it’s smart to build a dedicated mobile site.

This is why we believe Discover Anywhere Mobile is the ideal solution for your destination for mobile users. Your tourists are in-destination and ready to spend money to have great experiences. Every barrier you place between your listings and travelers is likely to decrease spending and spoil your best opportunity to get repeat visits and word-of-mouth advertising from satisfied customers.