Part of the Rule of Life for Secular Order Discalced Carmelites is to pray the Liturgy of the Hours, morning and evening prayer.
So, my wife and myself have been praying the LOTH's for many years now.
We started off with the single volume, "Christian Prayer: The Liturgy of the Hours," by Catholic Publishing, and for morning and evening prayer, this is good. In fact, during our monthly meeting, this volume follows right along with the 4 volume set, for Sundays.
Last year, we finally purchased the 4 Volume Set of the Liturgy of the Hours.
The 4 Volume Set is more complete for the Office of the Readings, but it can be a little more tricky to follow than the single volume, especially if you're not experienced in praying the LOTH. Also, most people don't have the time for more than the Morning and Evening Prayer, so the single volume is better suited, and much less expensive, about $30. My four volume set cost $120.
Keep in mind, that this edition is a 4 week cycle. That is, the the Psalms are prayed through in 4 weeks. If you visit a Benedictine Monastery, you'll see that they follow a 2 week cycle, and their using their own translations of the Psalms, so your Breviary won't work out all that well if you try to use it when visiting there.
In all, praying the Liturgy of the Hours is very rewarding, and all Catholics should learn how to do it and pray it daily.
Jim