I really like my new Keto-Mojo meter. I watched the Youtube instructional videos many times and with a few trial and errors was able to successfully measure glucose and ketone levels. I highly recommend this meter to anyone interested in being ketogenic. I would recommend to read through the manual first, then carefully and several times watch the Youtube videos and follow directions. I wasted a few lancets and strips at first, but finally did it right and am very pleased with this device. Thank you.