My GF & I did a week long water fast. It was neat watching our Glucose numbers fall daily as our Ketones went up. She is a nurse and would also test her Glucose at work - very similar numbers to the Precision Xtra. Now we are on a keto diet and check our numbers a couple of times per week. The meter is smaller than I thought, but easy to read. If you don't want to use any of its special features, it is easy to use. Just prep your lancing device, CAREFULLY tear open a test strip (try not to bend it), when you insert the strip into the meter it will turn on automatically, lance your finger, give your finger a little squeeze to allow the end of the test strip to suck up enough blood to fill the tiny reservoir. When the meter beeps, it has enough blood and starts the test. After a few seconds, your number (Glucose, or Ketones) is displayed. Pull the used test strip out, and the meter turns itself off again. This box came with lots of instructions, a small zippered case, and a lancing device. I don't think it came with any test strips or lancets (needles), but I like to get the 33 gauge tiny ones anyway, and it is good to get the fresh test strips. So far, I haven't had any errors. Tip: take care of your test strips and be sure not to bend them too much - it can mess them up.

Wanted to see if I'm in ketosis for sure. Way more precise than pee stix. Wife joined in and now we're both checking our glucose and ketones, tweaking diet to get there. Great investment. Just completed 5-day water fast. Was nice to check numbers throughout the week and confirm I wasn't too far out of whack. Would by again.

I bought this meter because I'm on a ketogenic diet and needed a way to keep track of my ketone levels. This meter is easy to set up and use. No problems. It does the readings quickly. The included lancing device is also easy to use and is much less painful that using lancets on their own.

Stopped working after 6 months - battery is still good, unit wants to reset the clock or simply not responding.

Keeps me in check to see if any foods kick me out of keto!