I have to disagree. I tried it for a couple of weeks but have unsubscribed. The problem is that Harris talks way too much during guided meditations. A good guided meditation normally has a judicious mix of instructions and silence, but Harris keeps rambling on, making it difficult to concentrate on the instructions. He has an old guided meditation available on YouTube; that one is much better.

Insight Timer is a much better app IMO. In terms of better guided instructions, I would recommend Peter Russell, Michael Taft, Joseph Goldstein and Sharon Salzberg.