Its decent for a tight spot, but there are smaller cutters out there. You could pick up really small ones at say, harbor freight for a buck or two, and they'll work a couple times, then are pretty much throwaway. The HF ones like to spiral, too, rather than cut, but its like dollar screwdrivers or flashlights - good in a pinch or tight spot, but not something to really be depended on.
I had a customer give me one of these, maybe 15 years ago, and I lost it/left it somewhere. Its just a nice vintage cutter that is pretty unique, and works really well. Plenty of good cutters out there (ridgids), plenty of junk ones, too. They even have automatic/battery operated ones.
From what I've seen, they pop up on ebay, and usually run 10-20 bucks with shipping. Really made my day finding it again, now I need to get my hands on one :)