Hughes did a stupendous job with this one. The topic is a theological "heavy-hitter" - Christology. Therefore, there are many chapters that are necessarily dense and taken a bit slower than other sections of the work.
However, for such a complicated topic, Hughes handles the subject matter very well and constantly brings it to a point of modern relevance. I read several other works on Christology while reading Hughes' work, but Hughes' was the most impressive, straightforward, and I would argue - the most relevant lest Christ and Reconciliation by Veli-Matti Kärkkäinen.
Hughes', in the midst of theology and Scriptural understanding, explored heavy topics such as Creation, The Problem of Evil, the Works of Christ, and the Person of Christ. You can imagine the amount of work required that went into this - and it shows.
Again, the book is dense (~450 pages with smaller print), so reading cover to cover would take some time. But the chapters themselves are shorter and highly focused, if one wished to seek specific information on a certain topic.