This was my first real multisport test of this system. I wore a wetsuit and left the receiver on my bike, so I didn’t have access to its data while swimming or immediately afterwards. That said, it did resume readings fairly quickly after I started biking. Biggest change from the prior way of doing things (fingerstick testing before and after the race) was that greatly reduced my tendency to overtreat with carbs. I ate more power gels than really needed during the bike ride and went a bit high, but I was able to correct that by avoiding them during the run and finishing with a fairly normal blood sugar.

The key point for everyone to be aware of is that there is some delay with the readings in these, which is typically about 20 minutes. If it’s well calibrated, it’s actually telling you what your blood sugar was about 20 minutes ago. It’s not a perfect system, but is far superior to finger testing 4 to 12 times per day.

Other issue with both these and the G6 is that it’s very difficult to get them to stay in place for the 7 days (now 10 with the G6), particularly in the summer when you sweat a lot. Fortunately for me, I’ve been able to get my insurance provide a few extra to allow for more frequent sensor changes as needed.