Pros:
The Full Music (organists) edition is well laid out, and the notation is uncluttered and easy to read. The paper is fairly thin, so the book very importantly stays open very well on the right page, no tendency to flop closed mid-verse!
Music is grouped by seasonal use, (Lent, Advent, Christmastide, Eastertide etc) or liturgical headings such as "Trust, Hope and Guidance", "Mary", "The Kingdom", "Commitment, Discipleship, Mission" amongst others.
There is also a very useful set of indeces at the back of both Volumes (no need to remember which has the index in!), an index of first lines, a metrical tune index (incase you want to play one hymn to the tune of another!) an alphabetical tune index (by tune name, ie Winchester Old/New, Tallis' canon, Down Ampney etc) A Psalm index (with gaps-be warned), a Scriptural Index, a chart for choosing music in Ordinary time, for Years A,B and C.
There are 6 complete Mass Settings suitable for regular use. But some of them will soon become tiresome.
Cons:
Perhaps to appeal beyond the bounds of the Catholic liturgy a few of the "classics" have been left out, i.e. "May is the month of Mary", and "Bring Flowers of the Rarest".
Other notable exclusions/ommissions include Sweet heart of Jesus, and many of the psalms (though there is a separate psalm supplement for you to buy). There are a few others which you may be disappointed/frustrated that are not in there, especially some good newer hymns, from The Iona Community etc.
A lot of the plainsongs have been supplied with slightly mawkish harmonies by the editor Stephen Dean, but you can ignore these.
Some fairly "ropey" 1960's/70's Hymns are still there, and a flick though gives one a strong sense that the editor is probably personal friends with at least a couple of the composers.
It isn't the hymnbook to end all hymnbooks, and I'd advise you not to discard the contents of your music cupbord just yet, but all in all it is a valuable parish resource, and the strongest candidate for Sunday by Sunday parish use.
To Conclude:
It is an excellent hymnbook, and a great deal of effort has gone into the cataloguing of the hymns. It will make Hymn Choosing a quicker experience, as like is grouped with like, so you can see all your options for a particular theme. This also means that you are more likely to stumble across alternatives.
It is a fine collection, with many recently written songs, but lacks any adventurous new hymns which push musical boundaries or offer a competant choir a challenge.