Highly recommended, as a commentary, reference tool and as a daily devotional. Ryle devoted a great part of his life to this series and he proves to be thoroughly Biblical, anti-liberal and well reasoned.
I'm a bit surprised this series of books isn't more popular... Perhaps the wordy titles and Victorian copyrights are throwing people off. Irregardless, Ryle is extremely readable and, surprising or not, he spends some of his time arguing against the liberal theologies and interpretations of his day, which is handy since they are the same fallacies we face today.
An added attraction is, the copyrights have run out and a printed version probably can be had for free, if not, a very kind volunteer over at LibriVox has made wonderful audio recordings of most if not all of the series.
I've been using these as devotionals and, when finished, will probably flip to the beginning and start the series anew.