I was skeptical of this product at first, but they have been providing good information, so I believe this may be a worthwhile product for those who have an extra $180 to drop.
But I feel the best for those who don't have or don't want to spend that much on a single use device, the oven method using a pizza stone is still about the best option. No, its not giving to Nth last percentage of cannabinoids, but it gets pretty close when done as precisely as possible. 27 minutes at 250F is still a viable guideline. Use a digital oven thermometer ( there not expensive ) and a pizza stone. You'll get at least 80% and more likely 90% + with this method