Really very much worth the price for the convenience, individualized commentary/focus on particular interest areas, effortless transport and lunch. We skipped lines, were furnished with umbrellas for the rainy day, were shepherded from one highlight to another without having to figure anything out, and were given very focused historical and cultural commentary based on our articulated areas of interest. Definitely pricey but if you want a seamless, effortless day, it's worth it.