(Note: I'm reviewing from the dad's perspective)
We had an amazing experience with Jolly Good Sleep. Within just a few weeks, our little one went from ~30 minute naps and multiple nightly wake-ups to long, full naps and sleeping through the night. I personally went from lost, frustrated and exhausted to informed, optimistic and empowered over the course of 2-3 weeks.
Lindsay is incredibly knowledgeable, thorough, helpful and patient - not to mention friendly - and we would recommend her and JGS to anyone struggling to understand infant sleep patterns. Thank you, Lindsay!!