I do have an Olfa compass cutter that I bought years ago but the cutting diameter is limited to around 5mm or more even after cutting down one side of the compass point.
The advantage of this circle cutter is that the blades can be found in box cutter type knives that are readily available in hardware stores, when blunt you just break another blade off the strip and replace it.
It's quite a compact design and feels quite sturdy when using it, and as to the claim it can cut circles down to 1.5mm diameter then they are quite correct!
The plastic sheet I used for the test was fairly thin and if you own a round punch and die set you can punch discs easily up to 2mm, however you can only go to a certain thickness before a punch won't work. Compared to the Olfa cutter it's very obvious just how smaller the gap is between the compass point and blades on this new cutter;
and remember I cut down one side of the Olfa cutter too.
In conclusion this is a useful addition to the modelling tool inventory, particularly if you scratch a lot of parts for projects and it fills the gap between 2mm and 5mm discs that I couldn't cut before. Recommended!
Circle cutter courtesy of my credit card and available from Uschi Van Der Rosten