I've gotten the "HI" reading a few times, and I've been in the 500's and lower on my meter. I think the "HI" reading is for anything over 599.
So has everyone had pretty good blood sugars except for one or two 500's? If so, i feel bad. Because I've definitively been in the 500 and 400 many times, however I guess it is many times in the past 7 years.
I've had plenty of bad sites, or my personal favorite is when i found out what that weird ringing noise was a few hours after first hearing it. It was my pump displaying "NO DELIVERY" which was a pretty good explanation for my unusually high reading after noticing that!
I hate being high though, the constant thirst and bathroom trips, and that weird feeling you get in your muscles like intense pins and needles-ish feeling.