Please be aware that this is NOT a complete set of Bach's sacred cantatas. It is the complete recordings from the Gardiner Bach Cantata pilgrimage.
There is no doubt about the quality of the performances and recordings. Pick any CD at random from the set, pop it into your stereo and you'll be delighted. However, the card sleeves in which the discs are housed are rather thin and I wonder how well they will stand up to repeated handling.
Don't hesitate to buy if you want all of Gardiner's Bach and you can put up with the flimsy CD sleeves, but if you are looking for the COMPLETE cantatas you will need to look elsewhere.