Fantastic! If you think you'll like it, you'll love it. One thing to note, these are transcriptions of Cello Suites, not the Lute Suites(yeah, yeah... I know there are only 4). As background, I've got a master's in music(Classical Guitar- performance) and a few semesters towards a Phd. in musicology. If you haven't had the pleasure of hearing one of the great lutenists I can't recommend this highly enough. Gone are the days when early music was relegated to the "Those Who Can't" crowd. Everything about this recording, the playing, the transcription, the instrument and the recording itself are all first-rate. The Baroque Lute(Archlute/Theorbo) is a fabulous instrument in the right hands(like Smith or Kirchoff). The one on the recording is a 13-course so that puts it around 24 strings some of which are doubled like a modern-day 12-string(6-course). A fabulous player like Smith can get all of the sparkle, and nearly all of the range of a harpsichord with the nuance and inflection that comes from being in contact with the actual string.
As a guitarist, I've heard dozens of interpretations/transcriptions of the Cello suites, and for good reason; they are fantastic. If you're thinking about dipping your toes into the vast ocean of Bach's music, they are a great place to start. At no point in listening to these recordings did I feel Smith's additions were unfaithful or jarring to the original. I should note that I love Gould on a nine-foot Stienway and the Swingle Singer's interpretations of Bach too... I'm no purist. This is obviously a much more historically informed interpretation, even with the addition of harmonies and counter-melodies etc. That said, at no point in the recording did I feel Smith's playing lacked the "singing" quality which is often missing in guitar versions of the cello suites or some(most) of the early music recordings from a few decades back.