I started BBB halfway through last season and am a convert... I am so happy to actually know what's going on in my pool and add chemicals intelligently instead of willy nilly!
Back in early June when I opened the pool I would lose 1-1.5 ppm FC per day. Now (mid July) I'm losing 2.5 -3. The water is obviously warmer (now 80F) and it's sunnier (like many of you, in a huge heat wave right now). The pool is in full sun 80% of the day. It's usually just me in the pool for 10-30 min/day (pretty minimal use overall). Does that seem like a lot of FC loss?
The rest of my numbers:
FC 6.5 - 8 depending on the day
Is my target FC too high? When I was targeting FC of 6 it would sometimes drop to 4 on a sunny day and then the beginnings of algae started so I had to pounce right away. I decided to increase my target FC a bit but perhaps my CYA isn't high enough for a target FC of 7-8 so I'm losing a lot of FC each day?