I liked this book. I am an adult learner who always hoped to be able to accompany the family at Christmas as we sang carols around the piano! A Victorian Christmas dream if you like!
But since I am still at about grade II level, I found the great majority of carol music far too difficult to play at a reasonable pace.
This book does certainly make it easy and possible to play decent carols and this Christmas we all sang happily. Although I did practice for a few weeks before hand.
The one negative is that a few of the arrangements are the USA version of a carol - in particular Away in a Manger is not the familiar form and there is no UK version.
A couple of the pieces were more of a grade II level, a couple were more of a grade I. On balance someone learning for about a year would get a lot of use out of this.