There are better cameras for £100. Now, they don't look as nice as that BenQ, but your money is going on the look and not the internals. What worries me most is the lack of a zoom - digital zoom is cheating and really doesn't cut it in this day and age.
You could either spend the extra money on the BenQ E520, or if you wanted to spend £50 more you could pick up something like the Olympus Mju Mini Digital S. It's got better features than the BenQ, will probably last longer and should look equally as attractive to the missus.
Hell, they even come in pink for the girls: