Mine is around that 30 mark, lowest my sugar has ever hit was like 26, I could barely move though. I was walking towards the kitchen because I was shaking pretty bad, ended up getting really light headed and fell down onto the sofa (our kitchen and living room are connected, not wall or door blocking one from the other). Luckily my mom was in there and injected my leg with one of those sugar pens, only time I've ever had to use one. As soon as she injected me with it she tested my sugar for me and it was like 26 IIRC.
They tried to get me to use the pens, but I was too interested in the pump since I was (still currently am) a teenager. It helps out SOO much for staying out all night long, pulling all nighters at my buddies shop working on cars, being able to eat whatever I want, whenever I want. I love it, so much.